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rgonzalezfluendo/chromium build args

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chromium build args
action_pool_depth
Current value (from the default) = -1
From //build/toolchain/BUILD.gn:11
Pool for non goma tasks.
added_rust_stdlib_libs
Current value (from the default) = []
From //build/config/rust.gni:44
Any extra std rlibs in your Rust toolchain, relative to the standard
Rust toolchain. Typically used with 'use_unverified_rust_toolchain' = true
allow_critical_memory_pressure_handling_in_foreground
Current value (from the default) = false
From //content/common/features.gni:14
allow_runtime_configurable_key_storage
Current value (from the default) = false
From //components/os_crypt/features.gni:17
Whether to make account and service names for the crypto key storage
configurable at runtime for embedders.
Currently only has an effect on macOS via KeychainPassword
also_build_ash_chrome
Current value (from the default) = false
From //build/config/chromeos/ui_mode.gni:26
Setting this to true when building linux Lacros-chrome will cause it to
*also* build linux ash-chrome in a subdirectory using an alternate
toolchain.
Don't set this unless you're sure you want it, because it'll double
your build time.
also_build_lacros_chrome
Current value (from the default) = false
From //build/config/chromeos/ui_mode.gni:30
Setting this to true when building linux ash-chrome will cause it to
*also* build linux Lacros-chrome in a subdirectory using an alternate toolchain.
also_build_lacros_chrome_for_architecture
Current value (from the default) = ""
From //build/config/chromeos/ui_mode.gni:35
Setting this when building ash-chrome will cause it to
*also* build Lacros-chrome in a subdirectory using an alternate toolchain.
You can set this to either "amd64" or "arm".
alternate_cdm_storage_id_key
Current value (from the default) = ""
From //media/media_options.gni:218
If |enable_cdm_storage_id| is set, then an implementation specific key
must also be provided. It can be provided by defining CDM_STORAGE_ID_KEY
(which takes precedence), or by setting |alternate_cdm_storage_id_key|.
The key must be a string of at least 32 characters.
android_channel
Current value (from the default) = "default"
From //build/config/android/channel.gni:8
The channel to build on Android: stable, beta, dev, canary, work, or
default. "default" should be used on non-official builds.
android_full_debug
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:60
Normally, Android builds are lightly optimized, even for debug builds, to
keep binary size down. Setting this flag to true disables such optimization
angle_64bit_current_cpu
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:84
angle_assert_always_on
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:79
angle_build_all
Current value (from the default) = false
From //third_party/angle/BUILD.gn:42
Don't build extra (test, samples etc) for Windows UWP. We don't have
infrastructure (e.g. windowing helper functions) in place to run them.
angle_build_capture_replay_tests
Current value (from the default) = false
From //third_party/angle/src/tests/capture_replay_tests/BUILD.gn:9
Determines if we build the capture_replay_tests. Off by default.
angle_build_tests
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:258
True if we want to build the ANGLE test suites. On by default in most configs.
angle_build_vulkan_system_info
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:240
angle_capture_replay_composite_file_id
Current value (from the default) = 1
From //third_party/angle/src/tests/capture_replay_tests/BUILD.gn:14
angle_capture_replay_test_trace_dir
Current value (from the default) = "traces"
From //third_party/angle/src/tests/capture_replay_tests/BUILD.gn:12
Set the trace directory. Default is traces
angle_debug_layers_enabled
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:99
By default we enable debug layers when asserts are turned on.
angle_delegate_workers
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:137
By default, ANGLE is using a thread pool for parallel compilation.
Activating the delegate worker results in posting the tasks using the
embedder API. In Chromium code base, it results in sending tasks to the
worker thread pool.
angle_egl_extension
Current value (from the default) = ""
From //third_party/angle/BUILD.gn:62
Allow shared library custom name extensions for setting soname such as libEGL.so.1
angle_enable_abseil
Current value (from the default) = true
From //third_party/angle/BUILD.gn:50
Abseil has trouble supporting MSVC, particularly regarding component builds.
http://crbug.com/1126524
angle_enable_annotator_run_time_checks
Current value (from the default) = false
From //third_party/angle/BUILD.gn:53
Adds run-time checks to filter out EVENT() messages when the debug annotator is disabled.
angle_enable_apple_translator_workarounds
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:252
angle_enable_cgl
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:249
TODO(jdarpinian): Support enabling CGL and EAGL at the same time using the soft linking code. Also support disabling both for Metal-only builds.
angle_enable_cl
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:21
Enables OpenCL support, off by default.
angle_enable_cl_passthrough
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:169
Enables the OpenCL pass-through back end
angle_enable_commit_id
Current value (from the default) = true
From //third_party/angle/BUILD.gn:46
Enable generating current commit information using git
angle_enable_custom_vulkan_cmd_buffers
Current value (from the default) = true
From //third_party/angle/src/libANGLE/renderer/vulkan/BUILD.gn:15
Enable custom (cpu-side) secondary command buffers
angle_enable_custom_vulkan_outside_render_pass_cmd_buffers
Current value (from the default) = true
From //third_party/angle/src/libANGLE/renderer/vulkan/BUILD.gn:24
angle_enable_custom_vulkan_render_pass_cmd_buffers
Current value (from the default) = true
From //third_party/angle/src/libANGLE/renderer/vulkan/BUILD.gn:28
angle_enable_d3d11
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:143
angle_enable_d3d11_compositor_native_window
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:218
angle_enable_d3d9
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:142
angle_enable_desktop_glsl
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:191
Translator frontend support:
angle_enable_eagl
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:224
We should use EAGL (ES) on iOS except on Mac Catalyst on Intel CPUs, which uses CGL (desktop GL).
angle_enable_essl
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:195
angle_enable_gl
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:145
angle_enable_gl_desktop
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:163
angle_enable_gl_null
Current value (from the default) = true
From //third_party/angle/src/libANGLE/renderer/gl/BUILD.gn:16
angle_enable_glsl
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:196
angle_enable_hlsl
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:194
Translator backend support:
angle_enable_metal
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:166
http://anglebug.com/2634
angle_enable_msl_through_spirv
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:129
By default, include the SPIR-V based MSL translator (in addition to the direct translator)
angle_enable_null
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:162
Disable null backend to save space for official build.
angle_enable_overlay
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:244
Enable overlay by default when debug layers are enabled. This is currently only implemented on
Vulkan.
angle_enable_perf_counter_output
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:221
Disable performance counter output by default
angle_enable_renderdoc
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:262
angle_enable_spirv_gen_through_glslang
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:212
angle_enable_swiftshader
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:188
angle_enable_trace
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:197
angle_enable_trace_android_logcat
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:198
angle_enable_trace_events
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:199
angle_enable_vulkan
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:150
angle_enable_vulkan_gpu_trace_events
Current value (from the default) = false
From //third_party/angle/src/libANGLE/renderer/vulkan/BUILD.gn:18
Enable Vulkan GPU trace event capability
angle_enable_vulkan_system_info
Current value (from the default) = false
From //third_party/angle/BUILD.gn:35
Enable using Vulkan to collect system info as a fallback.
angle_enable_vulkan_validation_layers
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:205
angle_expose_non_conformant_extensions_and_versions
Current value (from the default) = false
From //third_party/angle/BUILD.gn:56
Enables non-conformant extensions and features
angle_extract_native_libs
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:11
Extract native libs in ANGLE apk. Useful for flamegraph generation.
angle_force_context_check_every_call
Current value (from the default) = false
From //third_party/angle/BUILD.gn:59
Optional feature that forces dirty state whenever we use a new context regardless of thread.
angle_glesv2_extension
Current value (from the default) = ""
From //third_party/angle/BUILD.gn:63
angle_has_frame_capture
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:126
Frame capture code is enabled by default if rapidjson is available.
angle_has_histograms
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:255
angle_has_rapidjson
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:94
Indicate if the rapidJSON library is available to build with in third_party/.
angle_is_winuwp
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:113
There's no "is_winuwp" helper in BUILDCONFIG.gn, so we define one ourselves
angle_libs_suffix
Current value (from the default) = ""
From //third_party/angle/gni/angle.gni:119
angle_link_glx
Current value (from the default) = false
From //third_party/angle/BUILD.gn:38
Link in system libGL, to work with apitrace. See doc/DebuggingTips.md.
angle_restricted_traces
Current value (from the default) = []
From //third_party/angle/gni/angle.gni:23
angle_shared_libvulkan
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:110
Vulkan loader is statically linked on Mac. http://anglebug.com/4477
angle_standalone
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:140
True if we are building inside an ANGLE checkout.
angle_use_custom_libvulkan
Current value (from the default) = true
From //third_party/angle/src/common/vulkan/BUILD.gn:13
angle_use_gbm
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:45
angle_use_spirv_gen_through_glslang
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:172
Use glslang to generate SPIR-V
angle_use_vulkan_display
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:50
angle_use_vulkan_null_display
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:159
When set to true, ANGLE will not use VK_KHR_surface and VK_KHR_swapchain
extensions. Content can be rendered only off-screen.
angle_use_wayland
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:49
angle_use_x11
Current value (from the default) = true
From //third_party/angle/gni/angle.gni:46
angle_vulkan_display_mode
Current value (from the default) = "simple"
From //third_party/angle/gni/angle.gni:14
Display mode for ANGLE vulkan display, could be 'simple' or 'headless', default is 'simple'.
angle_vulkan_headers_dir
Current value = "//third_party/vulkan-deps/vulkan-headers/src"
From //.gn:52
Overridden from the default = "//third_party/angle/third_party/vulkan-deps/vulkan-headers/src"
From //third_party/angle/gni/angle.gni:232
angle_vulkan_loader_dir
Current value = "//third_party/vulkan-deps/vulkan-loader/src"
From //.gn:53
Overridden from the default = "//third_party/angle/third_party/vulkan-deps/vulkan-loader/src"
From //third_party/angle/gni/angle.gni:234
angle_vulkan_tools_dir
Current value = "//third_party/vulkan-deps/vulkan-tools/src"
From //.gn:54
Overridden from the default = "//third_party/angle/third_party/vulkan-deps/vulkan-tools/src"
From //third_party/angle/gni/angle.gni:236
angle_vulkan_validation_layers_dir
Current value = "//third_party/vulkan-deps/vulkan-validation-layers/src"
From //.gn:56
Overridden from the default = "//third_party/angle/third_party/vulkan-deps/vulkan-validation-layers/src"
From //third_party/angle/gni/angle.gni:238
angle_wayland_dir
Current value (from the default) = "//third_party/angle/third_party/wayland"
From //third_party/angle/gni/angle.gni:229
Directory where to find wayland source files
angle_with_capture_by_default
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:18
Defaults to capture building to $root_out_dir/angle_libs/with_capture.
Switch on to build capture to $root_out_dir.
apm_debug_dump
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:117
Selects whether debug dumps for the audio processing module
should be generated.
archive_seed_corpus
Current value (from the default) = true
From //build/config/sanitizers/sanitizers.gni:108
When true, seed corpora archives are built.
audio_input_sample_rate
Current value (from the default) = 16000
From //chromecast/chromecast.gni:118
Recording happens at this sample rate. Must be 16000, 48000 or 96000 Hz.
auto_profile_path
Current value (from the default) = ""
From //build/config/compiler/BUILD.gn:86
AFDO (Automatic Feedback Directed Optimizer) is a form of profile-guided
optimization that GCC supports. It used by ChromeOS in their official
builds. To use it, set auto_profile_path to the path to a file containing
the needed gcov profiling data.
blink_animation_use_time_delta
Current value (from the default) = false
From //third_party/blink/renderer/core/animation/BUILD.gn:11
Use base::TimeDelta to represent time in renderer/core/animations. See
http://crbug.com/737867
blink_enable_generated_code_formatting
Current value (from the default) = false
From //third_party/blink/renderer/config.gni:26
Format the generated files to improve the code readability. Apply clang-
format, gn format, etc. to the generated files if possible.
blink_gc_plugin
Current value (from the default) = true
From //third_party/blink/renderer/BUILD.gn:18
Set to true to enable the clang plugin that checks the usage of the Blink
garbage-collection infrastructure during compilation.
blink_gc_plugin_option_do_dump_graph
Current value (from the default) = false
From //third_party/blink/renderer/BUILD.gn:22
Set to true to have the clang Blink GC plugin emit class graph (in JSON)
with typed pointer edges; for debugging or other (internal) uses.
blink_gc_plugin_option_warn_unneeded_finalizer
Current value (from the default) = false
From //third_party/blink/renderer/BUILD.gn:27
Set to true to have the clang Blink GC plugin additionally check if
a class has an empty destructor which would be unnecessarily invoked
when finalized.
blink_symbol_level
Current value (from the default) = -1
From //third_party/blink/renderer/config.gni:40
How many symbols to include in the build of blink. This affects
the performance of the build since the symbols are large and dealing with
them is slow.
2 means regular build with symbols.
1 means medium symbols, usually enough for backtraces only. Symbols with
internal linkage (static functions or those in anonymous namespaces) may not
appear when using this level. On some platforms (including Windows)
filenames and line numbers will be included. Information about types and
locals is not included.
0 means minimal symbols, which on some platforms (including Windows) may
include function names suitable for backtraces.
-1 means auto-set according to debug/release and platform.
branding_file_path
Current value (from the default) = "//chrome/app/theme/chromium/BRANDING"
From //build/config/chrome_build.gni:24
The path to the BRANDING file in chrome/app/theme.
branding_path_component
Current value (from the default) = "chromium"
From //build/config/chrome_build.gni:18
build_angle_deqp_tests
Current value (from the default) = false
From //third_party/angle/src/tests/BUILD.gn:12
Don't build dEQP by default.
build_angle_gles1_conform_tests
Current value (from the default) = false
From //third_party/angle/src/tests/BUILD.gn:13
build_angle_perftests
Current value (from the default) = true
From //third_party/angle/src/tests/BUILD.gn:16
build_angle_trace_perf_tests
Current value (from the default) = false
From //third_party/angle/src/tests/BUILD.gn:14
build_contextual_search
Current value (from the default) = false
From //components/contextual_search/features.gni:6
build_dawn_tests
Current value (from the default) = true
From //ui/gl/features.gni:26
Should Dawn test binaries (unittests, end2end_tests, perf_tests) be built?
Independent of use_dawn, which controls whether Dawn is used in Chromium.
build_libsrtp_tests
Current value (from the default) = false
From //third_party/libsrtp/BUILD.gn:10
Tests may not be appropriate for some build environments, e.g. Windows.
Rather than enumerate valid options, we just let clients ask for them.
build_tflite_with_ruy
Current value (from the default) = true
From //third_party/tflite/features.gni:13
Turns on TFLITE_WITH_RUY, using ruy as the gemm backend instead of gemmlowp.
build_tflite_with_xnnpack
Current value (from the default) = true
From //third_party/tflite/features.gni:10
This enables building TFLite with XNNPACK. Currently only available for
Linux x64.
build_with_internal_optimization_guide
Current value (from the default) = false
From //components/optimization_guide/features.gni:38
Use is_chrome_branded as a proxy for "does src-internal exist".
build_with_mozilla
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:144
Enable to use the Mozilla internal settings.
build_with_tflite_lib
Current value (from the default) = true
From //components/optimization_guide/features.gni:14
builtin_cert_verifier_feature_supported
Current value (from the default) = false
From //net/features.gni:46
Platforms where both the builtin cert verifier and a platform verifier are
supported and may be switched between using the CertVerifierBuiltin feature
flag. This does not include platforms where the builtin cert verifier is
the only verifier supported.
builtin_cert_verifier_policy_supported
Current value (from the default) = false
From //chrome/common/features.gni:35
Platforms where the BuiltinCertificateVerifierEnabled enterprise policy is
supported. This must must match the supported_on list of the policy in
policy_templates.json and be a subset of the
builtin_cert_verifier_feature_supported platforms.
See crbug.com/410574. This can be removed when the builtin verifier is
unconditionally enabled on all platforms.
bundle_widevine_cdm
Current value (from the default) = false
From //third_party/widevine/cdm/widevine.gni:58
Widevine CDM is bundled as part of Google Chrome builds.
cast_allow_developer_certificate
Current value (from the default) = false
From //third_party/openscreen/src/build/config/cast.gni:8
Whether or not self-signed certificates are enabled for the receiver
and sender implementations.
cast_build_incremental
Current value (from the default) = "999999"
From //chromecast/chromecast.gni:34
The incremental build number. The Cast automated builders will set this
value to indicate the buildset. Note: The default value should be greater
than any value the builder may assign to prevent attempted automatic updates
when the default value is used.
cast_is_debug
Current value (from the default) = false
From //chromecast/chromecast.gni:28
If true, IS_CAST_DEBUG_BUILD() will evaluate to 1 in version.h. Otherwise,
it will evaluate to 0. Overriding this when is_debug=false is useful for
doing engineering builds.
cast_streaming_enable_remoting
Current value (from the default) = false
From //components/cast_streaming/features.gni:9
Whether the cast remoting feature should be enabled in this build.
cast_volume_control_in_avsettings
Current value (from the default) = false
From //chromecast/chromecast.gni:59
Set to true on devices where the VolumeControl implementation is in the
libcast_avsettings_1.0.so instead of in libcast_media_1.0.so.
cc_wrapper
Current value (from the default) = ""
From //build/toolchain/cc_wrapper.gni:37
Set to "ccache", "icecc" or "distcc". Probably doesn't work on windows.
chrome_pgo_phase
Current value (from the default) = 0
From //build/config/compiler/pgo/pgo.gni:19
Specify the current PGO phase.
Here's the different values that can be used:
0 : Means that PGO is turned off.
1 : Used during the PGI (instrumentation) phase.
2 : Used during the PGO (optimization) phase.
PGO profiles are generated from `dcheck_always_on = false` builds. Mixing
those profiles with `dcheck_always_on = true` builds can cause the compiler
to think some code is hotter than it actually is, potentially causing very
bad compile times.
chrome_root_store_policy_supported
Current value (from the default) = false
From //chrome/common/features.gni:43
Platforms where the ChromeRootStoreEnabled enterprise policy is
supported. This must must match the supported_on/future_on list of the
policy in policy_templates.json and be a subset of the
chrome_root_store_supported platforms.
See https://crbug.com/1228958. This can be removed when the Chrome Root
Store is unconditionally enabled on all platforms.
chrome_root_store_supported
Current value (from the default) = false
From //net/features.gni:50
Platforms for which the builtin cert verifier can use the Chrome Root Store.
See https://crbug.com/1216547 for status.
chrome_wide_echo_cancellation_supported
Current value (from the default) = true
From //media/media_options.gni:306
Currently it is available on Win, Mac and Linux, since it requires the audio
service to run in a separate process.
chromecast_branding
Current value (from the default) = "public"
From //build/config/chromecast_build.gni:21
chromecast_branding is used to include or exclude Google-branded components.
Set it to "public" for a Chromium build.
TODO(crbug.com/1293517): Remove usages in Chromium and move to //chromecast.
chromeos_afdo_platform
Current value (from the default) = "atom"
From //build/config/compiler/BUILD.gn:109
This configuration is used to select a default profile in Chrome OS based on
the microarchitectures we are using. This is only used if
clang_use_default_sample_profile is true and clang_sample_profile_path is
empty.
chromeos_is_browser_only
Current value (from the default) = false
From //build/config/chromeos/ui_mode.gni:19
Deprecated, use is_lacros.
This controls UI configuration for Chrome.
If this flag is set, we assume Chrome runs on Chrome OS devices, using
Wayland (instead of X11).
TODO(crbug.com/1052397):
Define chromeos_product instead, which takes either "browser" or "ash".
Re-define the following variables as:
is_lacros = chromeos_product == "browser"
is_ash = chromeos_product == "ash"
clang_base_path
Current value (from the default) = "//third_party/llvm-build/Release+Asserts"
From //build/config/clang/clang.gni:17
clang_diagnostic_dir
Current value (from the default) = "../../tools/clang/crashreports"
From //build/config/compiler/compiler.gni:127
clang_emit_debug_info_for_profiling
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:112
Emit debug information for profiling wile building with clang.
clang_sample_profile_path
Current value (from the default) = ""
From //build/config/compiler/BUILD.gn:93
Path to an AFDO profile to use while building with clang, if any. Empty
implies none.
clang_use_chrome_plugins
Current value (from the default) = true
From //build/config/clang/clang.gni:14
clang_use_default_sample_profile
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:102
clang_version
Current value (from the default) = "15.0.0"
From //build/toolchain/toolchain.gni:36
com_init_check_hook_disabled
Current value (from the default) = false
From //base/BUILD.gn:63
Set to true to disable COM init check hooks.
compile_credentials
Current value (from the default) = true
From //sandbox/linux/BUILD.gn:17
compile_suid_client
Current value (from the default) = true
From //sandbox/linux/BUILD.gn:15
compiler_timing
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:115
Turn this on to have the compiler output extra timing information.
compute_build_timestamp
Current value (from the default) = "compute_build_timestamp.py"
From //build/timestamp.gni:17
This should be the filename of a script that prints a single line
containing an integer that's a unix timestamp in UTC.
This timestamp is used as build time and will be compiled into
other code.
This argument may look unused. Before removing please check with the
chromecast team to see if they still use it internally.
compute_inputs_for_analyze
Current value (from the default) = false
From //build/config/compute_inputs_for_analyze.gni:13
Enable this flag when running "gn analyze".
This causes some gn actions to compute inputs immediately (via exec_script)
where they would normally compute them only when executed (and write them to
a depfile).
This flag will slow down GN, but is required for analyze to work properly.
concurrent_links
Current value (from the default) = -1
From //build/toolchain/concurrent_links.gni:23
Limit the number of concurrent links; we often want to run fewer
links at once than we do compiles, because linking is memory-intensive.
The default to use varies by platform and by the amount of memory
available, so we call out to a script to get the right value.
content_shell_major_version
Current value (from the default) = "999"
From //content/shell/BUILD.gn:38
content_shell_product_name
Current value (from the default) = "Content Shell"
From //content/shell/BUILD.gn:36
content_shell_version
Current value (from the default) = "999.77.34.5"
From //content/shell/BUILD.gn:37
coverage_instrumentation_input_file
Current value (from the default) = ""
From //build/config/coverage/coverage.gni:36
The path to the coverage instrumentation input file should be a source root
absolute path (e.g. //out/Release/coverage_instrumentation_input.txt), and
the file consists of multiple lines where each line represents a path to a
source file, and the paths must be relative to the root build directory.
e.g. ../../base/task/post_task.cc for build directory 'out/Release'.
NOTE that this arg will be non-op if use_clang_coverage is false.
cppgc_allow_allocations_in_prefinalizers
Current value (from the default) = false
From //v8/BUILD.gn:297
Enable allocations during prefinalizer invocations.
cppgc_enable_caged_heap
Current value (from the default) = true
From //v8/BUILD.gn:290
cppgc_enable_object_names
Current value (from the default) = false
From //v8/gni/v8.gni:95
Enable object names in cppgc for debug purposes.
cppgc_enable_pointer_compression
Current value (from the default) = false
From //v8/gni/v8.gni:101
Enable pointer compression in cppgc.
cppgc_enable_verify_heap
Current value (from the default) = ""
From //v8/BUILD.gn:294
Enables additional heap verification phases and checks.
cppgc_enable_young_generation
Current value (from the default) = false
From //v8/gni/v8.gni:98
Enable young generation in cppgc.
cppgc_is_standalone
Current value (from the default) = false
From //v8/gni/v8.gni:92
crashpad_dependencies
Current value = "chromium"
From //.gn:49
Overridden from the default = "standalone"
From //third_party/crashpad/crashpad/build/crashpad_buildconfig.gni:19
Determines various flavors of build configuration, and which concrete
targets to use for dependencies. Valid values are "standalone", "chromium",
"fuchsia", "dart" or "external".
crashpad_http_transport_impl
Current value (from the default) = "libcurl"
From //third_party/crashpad/crashpad/util/net/tls.gni:21
crashpad_use_boringssl_for_http_transport_socket
Current value (from the default) = true
From //third_party/crashpad/crashpad/util/net/tls.gni:30
cros_board
Current value (from the default) = ""
From //build/config/chromeos/args.gni:8
This is used only by Simple Chrome to bind its value to test-runner scripts
generated at build-time.
cros_sdk_version
Current value (from the default) = ""
From //build/config/chromeos/args.gni:12
Similar to cros_board above, this used only by test-runner scripts in
Simple Chrome.
current_cpu
Current value (from the default) = ""
(Internally set; try `gn help current_cpu`.)
current_os
Current value (from the default) = ""
(Internally set; try `gn help current_os`.)
custom_toolchain
Current value (from the default) = ""
From //build/config/BUILDCONFIG.gn:147
Allows the path to a custom target toolchain to be injected as a single
argument, and set as the default toolchain.
custom_vulkan_loader_library_name
Current value (from the default) = ""
From //third_party/vulkan-deps/vulkan-loader/src/BUILD.gn:20
dawn_always_assert
Current value (from the default) = false
From //third_party/dawn/scripts/dawn_features.gni:44
Enable Dawn's ASSERTs even in release builds
dawn_complete_static_libs
Current value (from the default) = false
From //third_party/dawn/scripts/dawn_features.gni:49
Should the Dawn static libraries be fully linked vs. GN's default of
treating them as source sets. This is useful for people using Dawn
standalone to produce static libraries to use in their projects.
dawn_enable_d3d12
Current value (from the default) = false
From //third_party/dawn/scripts/dawn_features.gni:52
Enables the compilation of Dawn's D3D12 backend
dawn_enable_desktop_gl
Current value (from the default) = true
From //third_party/dawn/scripts/dawn_features.gni:63
Enables the compilation of Dawn's OpenGL backend
(best effort, non-conformant)
dawn_enable_error_injection
Current value (from the default) = false
From //third_party/dawn/scripts/dawn_features.gni:78
dawn_enable_metal
Current value (from the default) = false
From //third_party/dawn/scripts/dawn_features.gni:55
Enables the compilation of Dawn's Metal backend
dawn_enable_null
Current value (from the default) = true
From //third_party/dawn/scripts/dawn_features.gni:59
Enables the compilation of Dawn's Null backend
(required for unittests, obviously non-conformant)
dawn_enable_opengles
Current value (from the default) = true
From //third_party/dawn/scripts/dawn_features.gni:69
dawn_enable_vulkan
Current value (from the default) = true
From //third_party/dawn/scripts/dawn_features.gni:73
Enables the compilation of Dawn's Vulkan backend
Disables vulkan when compiling for UWP, since UWP only supports d3d
dawn_enable_vulkan_loader
Current value (from the default) = true
From //third_party/dawn/scripts/dawn_features.gni:92
dawn_enable_vulkan_validation_layers
Current value (from the default) = true
From //third_party/dawn/scripts/dawn_features.gni:87
dawn_use_angle
Current value (from the default) = true
From //third_party/dawn/scripts/dawn_features.gni:35
dawn_use_swiftshader
Current value (from the default) = true
From //third_party/dawn/scripts/dawn_features.gni:39
Enables SwiftShader as the fallback adapter. Requires dawn_swiftshader_dir
to be set to take effect.
dcheck_always_on
Current value (from the default) = true
From //build/config/dcheck_always_on.gni:25
dcheck_is_configurable
Current value (from the default) = false
From //build/config/dcheck_always_on.gni:14
Enables DCHECKs to be built-in, but to default to being non-fatal/log-only.
DCHECKS can then be set as fatal/non-fatal via the "DcheckIsFatal" feature.
See https://bit.ly/dcheck-albatross for details on how this is used.
default_command_line_flags
Current value (from the default) = []
From //chromecast/chromecast.gni:93
Contain default command line switches we want to set.
This will get joined into a comma-separated list that looks like:
"test-flag-one=public,test-flag-two=true,test-flag-three=1,"
TODO(ziyangch): make the parsing logic have ability to quote/escape characters.
device_user_agent_suffix
Current value (from the default) = ""
From //chromecast/chromecast.gni:147
device specific string to append to User string.
devtools_components_visibility
Current value (from the default) = ["*"]
From //third_party/devtools-frontend/src/front_end/ui/components/visibility.gni:8
devtools_dcheck_always_on
Current value (from the default) = false
From //third_party/devtools-frontend/src/scripts/build/ninja/vars.gni:8
devtools_entrypoints_visibility
Current value (from the default) = ["*"]
From //third_party/devtools-frontend/src/front_end/entrypoints/visibility.gni:8
devtools_fast_bundle
Current value (from the default) = true
From //third_party/devtools-frontend/src/scripts/build/ninja/bundle.gni:12
If this is enabled, devtools build uses esbuild instead of rollup.js to
bundle JavaScript files.
devtools_grd_location
Current value (from the default) = "third_party/devtools-frontend/src/front_end/devtools_resources.grd"
From //build/config/devtools.gni:29
devtools_lit_visibility
Current value (from the default) = ["*"]
From //third_party/devtools-frontend/src/front_end/ui/lit-html/visibility.gni:8
devtools_location
Current value (from the default) = "third_party/devtools-frontend/src/"
From //build/config/devtools.gni:27
devtools_models_visibility
Current value (from the default) = ["*"]
From //third_party/devtools-frontend/src/front_end/models/visibility.gni:8
devtools_panels_visibility
Current value (from the default) = ["*"]
From //third_party/devtools-frontend/src/front_end/panels/visibility.gni:8
devtools_root_location
Current value (from the default) = "third_party/devtools-frontend/src"
From //build/config/devtools.gni:26
devtools_skip_typecheck
Current value (from the default) = true
From //third_party/devtools-frontend/src/third_party/typescript/typescript.gni:15
devtools_third_party_visibility
Current value (from the default) = ["*"]
From //third_party/devtools-frontend/src/front_end/third_party/visibility.gni:8
devtools_ui_legacy_visibility
Current value (from the default) = ["*"]
From //third_party/devtools-frontend/src/front_end/ui/legacy/visibility.gni:8
devtools_use_remoteexec
Current value (from the default) = false
From //third_party/devtools-frontend/src/third_party/typescript/typescript.gni:13
Set to true to enable remote compilation of TypeScript using reclient.
This flag is temporarily until DevTools reclient support has stabilized.
At that point, this flag will be folded together with "use_remoteexec".
TODO(crbug.com/1139220): Remove the flag once we are confident.
devtools_visibility
Current value = ["*"]
From //.gn:63
Overridden from the default = []
From //third_party/devtools-frontend/src/front_end/visibility.gni:6
dfmify_feed_v2_modern
Current value (from the default) = false
From //components/feed/features.gni:13
Whether to include Feed as a DFM in ChromeModern builds.
disable_brotli_filter
Current value (from the default) = false
From //net/features.gni:22
Do not disable brotli filter by default.
disable_fieldtrial_testing_config
Current value (from the default) = false
From //components/variations/service/BUILD.gn:14
Set to true make a build that disables activation of field trial tests
specified in testing/variations/fieldtrial_testing_config.json.
Note: For Chrome-branded Android builds, this is always considered as set to
true (see below). This is done to avoid the binary size impact (~40 KiB) on
Android.
disable_file_support
Current value (from the default) = false
From //net/features.gni:9
Disables support for file URLs. File URL support requires use of icu.
disable_histogram_support
Current value (from the default) = false
From //components/cronet/BUILD.gn:16
If set to true, this will remove histogram manager to reduce binary size.
disable_libfuzzer
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:86
Helper variable for testing builds with disabled libfuzzer.
Not for client use.
disable_secure_flac_and_opus_decoding
Current value (from the default) = false
From //chromecast/chromecast.gni:97
Set to true to disable secure flac/opus support in EME, when using
cast CMA media backend and supporting Widevine or Playready.
enable_arcore
Current value (from the default) = false
From //device/vr/buildflags/buildflags.gni:38
Controls inclusion of code for ARCore that must be identical across configs.
Once crbug.com/920424 is resolved, this will exactly control whether ARCore
is supported.
TODO(crbug.com/843374): AR should not depend on |enable_vr|.
enable_assistant
Current value (from the default) = false
From //chromecast/chromecast.gni:47
Set true to enable assistant features.
enable_assistant_integration_tests
Current value (from the default) = false
From //chromeos/ash/components/assistant/assistant.gni:18
Enable Assistant integration tests using LibAssistant and a fake S3 server.
This requires libassistant.so to support grpc communication with the S3
server, which increases the library size, which is why we introduced this
flag to disable them in the release builds.
enable_audio_capture_service
Current value (from the default) = false
From //chromecast/chromecast.gni:124
Set to true to enable audio capture service for audio input.
enable_autofill_assistant_api
Current value (from the default) = false
From //extensions/buildflags/buildflags.gni:10
Compile time flag for the Autofill Assistant API.
WARNING: This must not be enabled in official builds.
enable_av1_decoder
Current value (from the default) = true
From //media/media_options.gni:108
enable_background_contents
Current value (from the default) = true
From //chrome/common/features.gni:46
Enables support for background apps.
enable_background_mode
Current value (from the default) = true
From //chrome/common/features.gni:47
enable_backup_ref_ptr_slow_checks
Current value (from the default) = false
From //base/allocator/allocator.gni:108
enable_base_tracing
Current value (from the default) = true
From //build_overrides/build.gni:22
Tracing support requires //third_party/perfetto, which is not available in
libchrome (CrOS's version of //base). This flag can disable tracing support
altogether, in which case all tracing instrumentation in //base becomes a
no-op.
TODO(crbug/1065905): Add dependency on perfetto to support typed events.
enable_basic_print_dialog
Current value (from the default) = true
From //chrome/common/features.gni:51
Enable the printing system dialog for platforms that support printing
and have a system dialog.
enable_basic_printing
Current value (from the default) = true
From //printing/buildflags/buildflags.gni:14
Enables basic printing support and UI.
enable_blink_bindings_tracing
Current value (from the default) = false
From //third_party/blink/renderer/platform/BUILD.gn:193
Enable TRACE_EVENT instrumentation for Blink bindings.
Disabled by default as it increases binary size.
enable_browser_speech_service
Current value (from the default) = true
From //chrome/services/speech/buildflags/buildflags.gni:20
Whether the speech service is implemented in the browser as a hosted service
possibly running in a utility process.
On other platforms, that service is either
* implemented some other way (e.g. ChromeOS, where ML Service provides the
implementation); or
* not implemented, and corresponding features don't exist as part of Chrome
(e.g. Android, where Live Caption is instead a system feature).
enable_call_graph_profile_sort
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:162
Turn off the --call-graph-profile-sort flag for lld by default. Enable
selectively for targets where it's beneficial.
enable_callgrind
Current value (from the default) = false
From //third_party/pdfium/pdfium.gni:54
Enable callgrind for performance profiling
enable_captive_portal_detection
Current value (from the default) = true
From //components/captive_portal/core/features.gni:9
enable_cast_audio_manager_mixer
Current value (from the default) = false
From //chromecast/chromecast.gni:102
enable_cast_audio_renderer
Current value (from the default) = false
From //build/config/chromecast_build.gni:38
True to enable the cast audio renderer.
TODO(crbug.com/1293520): Remove this buildflag.
enable_cast_media_runtime
Current value (from the default) = false
From //chromecast/chromecast.gni:140
True to link in alternate build targets for the Cast Media Runtime.
enable_cast_receiver
Current value (from the default) = false
From //build/config/chromecast_build.gni:47
Set this true for a Chromecast build. Chromecast builds are supported on
Linux, Android, ChromeOS, and Fuchsia.
During the migration from is_chromecast, this must be set to the same value
as is_chromecast.
enable_cast_renderer
Current value (from the default) = false
From //build/config/chromecast_build.gni:71
enable_cdm_host_verification
Current value (from the default) = false
From //media/media_options.gni:207
enable_cdm_storage_id
Current value (from the default) = false
From //media/media_options.gni:211
Enable Storage ID which is used by CDMs. This is only available with chrome
branding, but may be overridden by other embedders.
enable_cet_shadow_stack
Current value (from the default) = true
From //build/config/compiler/compiler.gni:134
Mark binaries as compatible with Shadow Stack of Control-flow Enforcement
Technology (CET). If Windows version and hardware supports the feature and
it's enabled by OS then additional validation of return address will be
performed as mitigation against Return-oriented programming (ROP).
https://chromium.googlesource.com/chromium/src/+/main/docs/design/sandbox.md#cet-shadow-stack
enable_chrome_notifications
Current value (from the default) = true
From //chrome/common/features.gni:54
Enables usage of notifications via Chrome's MessageCenter.
enable_chromecast_extensions
Current value (from the default) = true
From //chromecast/chromecast.gni:192
enable_chromecast_webui
Current value (from the default) = true
From //chromecast/chromecast.gni:44
If true, Chromecast WebUI resources are included in a build.
TODO(antz): default to false for audio-only builds, might need further
clean up (b/27119303)
enable_chromium_runtime_cast_renderer
Current value (from the default) = false
From //chromecast/chromecast.gni:137
True to use the Chromium runtime for cast rendering.
enable_chromium_updater
Current value (from the default) = false
From //chrome/browser/buildflags.gni:17
Chromium Updater is a cross-platform updater for desktop clients built using
Chromium code and tools. Code is in //chrome/updater. The design doc is
located at http://bit.ly/chromium-updater. Chrome is currently installed and
updated with proprietary updater (Omaha & Keystone). This build flag allows
integration with the open source, cross-platform Chromium updater.
TODO(crbug.com/1054060)
enable_click_to_call
Current value (from the default) = true
From //chrome/common/features.gni:57
Disable Click to Call on Fuchsia.
enable_color_manager
Current value (from the default) = false
From //components/exo/buildflags.gni:11
If true, enables zcr_color_manager_v1. This is a temporary flag meant to
guard an in-progress implementation, to be replaced by a feature flag.
enable_cros_libassistant
Current value (from the default) = false
From //chromeos/ash/components/assistant/assistant.gni:6
Enable assistant implementation based on libassistant.
enable_cros_media_app
Current value (from the default) = false
From //ash/webui/media_app_ui/media_app_ui.gni:7
Whether to enable the "real" ChromeOS Media App. When false, a mock app is
bundled for testing integration points.
enable_cross_trusted
Current value (from the default) = true
From //native_client_sdk/src/BUILD.gn:10
Set to true if cross compiling trusted (e.g. building sel_ldr_arm on x86)
binaries is supported.
enable_dangling_raw_ptr_checks
Current value (from the default) = false
From //base/allocator/allocator.gni:109
enable_dav1d_decoder
Current value (from the default) = true
From //media/media_options.gni:87
enable_discovery
Current value (from the default) = false
From //chrome/browser/sharing/buildflags.gni:6
enable_distro_version_check
Current value (from the default) = true
From //chrome/installer/linux/BUILD.gn:29
Enables checks that ensure the packages are installable on all supported
distributions.
enable_downgrade_processing
Current value (from the default) = true
From //chrome/browser/downgrade/buildflags.gni:9
enable_downstream_media_tests
Current value (from the default) = false
From //chrome/test/media_router/BUILD.gn:10
Many of the targets defined in this file have dependencies that cannot be
satisfied without additional downstream resources. Explicitly guard them
them behind this flag so that we do not attempt to build or isolate targets
in public chromium checkouts.
enable_dsyms
Current value (from the default) = false
From //build/config/apple/symbols.gni:17
Produce dSYM files for targets that are configured to do so. dSYM
generation is controlled globally as it is a linker output (produced via
the //build/toolchain/apple/linker_driver.py. Enabling this will result in
all shared library, loadable module, and executable targets having a dSYM
generated.
enable_expensive_dchecks
Current value (from the default) = true
From //build/config/dcheck_always_on.gni:30
Set to false to disable EXPENSIVE_DCHECK()s.
enable_extensions
Current value (from the default) = true
From //extensions/buildflags/buildflags.gni:6
enable_external_mojo_services
Current value (from the default) = true
From //chromecast/chromecast.gni:109
Set to true to enable external Mojo services to communicate with services
within cast_shell.
enable_fake_assistant_microphone
Current value (from the default) = false
From //chromeos/ash/components/assistant/assistant.gni:10
Enable a fake microphone, which can replay audio files as microphone input.
See chromeos/ash/components/assistant/tools/send-audio.sh
enable_feed_v2
Current value (from the default) = true
From //components/feed/features.gni:7
Whether Feed is enabled in the build.
enable_feed_v2_modern
Current value (from the default) = true
From //components/feed/features.gni:10
Whether to include Feed in ChromeModern builds.
enable_ffmpeg_video_decoders
Current value (from the default) = true
From //media/media_options.gni:192
On Android, FFMpeg is built without video decoders by default.
This flag gives the option to override that decision in case there are no
hardware decoders. To do so, you will also need to update ffmpeg build files
in order to define which decoders to build in.
enable_full_stack_frames_for_profiling
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:67
Compile in such a way as to make it possible for the profiler to unwind full
stack frames. Setting this flag has a large effect on the performance of the
generated code than just setting profiling, but gives the profiler more
information to analyze.
Requires profiling to be set to true.
enable_google_benchmarks
Current value (from the default) = false
From //third_party/google_benchmark/buildconfig.gni:11
Google Benchmark is not checked out by default, because it is only used by
a few specialized benchmarks that most developers do not interact with.
enable_gpu_client_logging
Current value (from the default) = false
From //gpu/command_buffer/client/BUILD.gn:13
Enable GPU client logging without DCHECK being on.
enable_gpu_service_logging
Current value (from the default) = false
From //ui/gl/BUILD.gn:21
Whether service side logging (actual calls into the GL driver) is enabled
or not.
enable_grpc_ares
Current value (from the default) = false
From //third_party/grpc/BUILD.gn:9
Compiles with ares.
enable_gvr_services
Current value (from the default) = false
From //device/vr/buildflags/buildflags.gni:11
enable_gwp_asan
Current value (from the default) = true
From //components/gwp_asan/buildflags/buildflags.gni:25
Convenience definition
enable_gwp_asan_malloc
Current value (from the default) = true
From //components/gwp_asan/buildflags/buildflags.gni:19
Is GWP-ASan malloc/PartitionAlloc hooking enabled for chrome/ on a given
platform.
enable_gwp_asan_partitionalloc
Current value (from the default) = true
From //components/gwp_asan/buildflags/buildflags.gni:20
enable_hangout_services_extension
Current value (from the default) = false
From //chrome/common/features.gni:61
Hangout services is an extension that adds extra features to Hangouts.
It is enableable separately to facilitate testing.
enable_hevc_parser_and_hw_decoder
Current value (from the default) = false
From //media/media_options.gni:100
enable_hls_demuxer
Current value (from the default) = false
From //media/media_options.gni:94
Enable HLS manifest parser and demuxer.
enable_hls_sample_aes
Current value (from the default) = false
From //media/media_options.gni:80
enable_ink
Current value (from the default) = false
From //pdf/features.gni:18
Enable ink libraries provided by the ChromeOS media app dependency.
This argument indicates whether the ink libraries provided by the ChromeOS
media app dependency is enabled. It also determines whether the annotation
feature is enabled for the PDF viewer.
enable_ipc_fuzzer
Current value (from the default) = false
From //tools/ipc_fuzzer/ipc_fuzzer.gni:14
Build IPC fuzzer by default if it's a supported configuration. For
sanitizer builds, this needs to be enabled explicitly as they can be slow
(especially MSan).
enable_ipc_logging
Current value (from the default) = false
From //ipc/features.gni:7
Enabling debug builds automatically sets enable_ipc_logging to true.
enable_iterator_debugging
Current value (from the default) = false
From //build/config/c++/c++.gni:41
When set, enables libc++ debug mode with iterator debugging.
Iterator debugging is generally useful for catching bugs. But it can
introduce extra locking to check the state of an iterator against the state
of the current object. For iterator- and thread-heavy code, this can
significantly slow execution - two orders of magnitude slowdown has been
seen (crbug.com/903553) and iterator debugging also slows builds by making
generation of snapshot_blob.bin take ~40-60 s longer. Therefore this
defaults to off.
enable_js_protobuf
Current value (from the default) = true
From //third_party/protobuf/proto_library.gni:145
Allows subprojects to omit javascript dependencies (e.g.) closure_compiler
and google-closure-library.
enable_js_type_check
Current value (from the default) = true
From //third_party/closure_compiler/compile_js.gni:11
Enable closure type-checking for Chrome's web technology-based UI. This
enables the webui_closure_compile target which does a no-op without this
flag enabled. Requires Java.
enable_jxl_decoder
Current value (from the default) = true
From //third_party/blink/public/public_features.gni:9
If true, adds support for JPEG XL image decoding.
enable_keystone_registration_framework
Current value (from the default) = true
From //chrome/BUILD.gn:60
Indicates whether keystone registration framework should be enabled (see
action("keystone_registration_framework") below). There are some tests
where we'd like for it to be disabled. (https://crbug.com/909080)
enable_kythe_annotations
Current value (from the default) = false
From //build/toolchain/kythe.gni:10
Enables Kythe annotations necessary to build cross references.
enable_libaom
Current value (from the default) = true
From //third_party/libaom/options.gni:7
Enable encoding and decoding AV1 video files.
enable_libaom_decoder
Current value (from the default) = false
From //third_party/libaom/options.gni:10
To be deprecated soon.
enable_libgav1_decoder
Current value (from the default) = false
From //third_party/libgav1/options.gni:12
enable_library_cdms
Current value (from the default) = true
From //media/media_options.gni:200
Enables the use of library CDMs that implements the interface defined at
media/cdm/api/content_decryption_module.h. If true, the actually library CDM
will be hosted in the mojo CDM service running in the CDM (utility) process.
Used for all desktop platforms except Fuchsia (crbug.com/1265618).
enable_linux_installer
Current value (from the default) = true
From //chrome/installer/BUILD.gn:11
enable_location_source
Current value (from the default) = true
From //base/BUILD.gn:52
Indicates if the Location object contains the source code information
(file, function, line). False means only the program counter (and currently
file name) is saved.
enable_log_error_not_reached
Current value (from the default) = false
From //build/config/logging.gni:12
enable_logging_override
Current value (from the default) = false
From //media/media_options.gni:85
Enable logging override, e.g. enable DVLOGs through level 2 at build time.
On Chromecast, these are logged as INFO.
On Fuchsia, these are logged as VLOGs.
enable_maldoca
Current value (from the default) = true
From //chrome/services/file_util/public/features.gni:14
Enables analysis of Office documents for malicious macros
enable_mdns
Current value (from the default) = true
From //net/features.gni:25
Multicast DNS.
enable_media_drm_storage
Current value (from the default) = false
From //media/media_options.gni:91
Enable browser managed persistent metadata storage for EME persistent
session and persistent usage record session.
enable_media_foundation_widevine_cdm
Current value (from the default) = false
From //third_party/widevine/cdm/widevine.gni:51
enable_media_overlay
Current value (from the default) = false
From //chromecast/chromecast.gni:130
Set to true to enable media overlay for volume bar, etc.
enable_media_remoting
Current value (from the default) = true
From //media/media_options.gni:294
This switch defines whether the Media Remoting implementation will be built.
When enabled, media is allowed to be renderer and played back on remote
devices when the tab is being casted and other conditions are met.
enable_media_remoting_rpc
Current value (from the default) = true
From //media/media_options.gni:300
Media Remoting RPC is disabled on Android since it's unused but increases
the native binary size by ~70Kb.
enable_message_center
Current value (from the default) = true
From //ui/base/ui_features.gni:30
enable_modular_updater
Current value (from the default) = false
From //build/config/chromecast_build.gni:33
Set true to enable modular_updater.
enable_mojo_tracing
Current value (from the default) = false
From //mojo/public/cpp/bindings/BUILD.gn:12
enable_mojom_closure_compile
Current value (from the default) = true
From //mojo/public/tools/bindings/mojom.gni:44
Enables Closure compilation of generated JS lite bindings. In environments
where compilation is supported, any mojom target "foo" will also have a
corresponding "foo_js_library_for_compile" target generated.
enable_mojom_fuzzer
Current value (from the default) = false
From //mojo/public/tools/bindings/mojom.gni:51
Enables generating javascript fuzzing-related code and the bindings for the
MojoLPM fuzzer targets. Off by default.
enable_mojom_message_id_scrambling
Current value (from the default) = true
From //mojo/public/tools/bindings/mojom.gni:39
Controls message ID scrambling behavior. If |true|, message IDs are
scrambled (i.e. randomized based on the contents of //chrome/VERSION) on
non-Chrome OS desktop platforms. Set to |false| to disable message ID
scrambling on all platforms.
enable_mojom_typemapping
Current value (from the default) = true
From //mojo/public/tools/bindings/mojom.gni:33
Indicates whether typemapping should be supported in this build
configuration. This may be disabled when building external projects which
depend on //mojo but which do not need/want all of the Chromium tree
dependencies that come with typemapping.
Note that (perhaps obviously) a huge amount of Chromium code will not build
with typemapping disabled, so it is never valid to set this to |false| in
any Chromium build configuration.
enable_mse_mpeg2ts_stream_parser
Current value (from the default) = false
From //media/media_options.gni:64
enable_mutex_priority_inheritance
Current value (from the default) = false
From //base/BUILD.gn:68
Set to true to enable mutex priority inheritance. See the comments in
LockImpl::PriorityInheritanceAvailable() in lock_impl_posix.cc for the
platform requirements to safely enable priority inheritance.
enable_nacl
Current value (from the default) = true
From //components/nacl/features.gni:14
enable_nocompile_tests
Current value (from the default) = true
From //build/nocompile.gni:68
TODO(crbug.com/105388): make sure no-compile test is not flaky.
enable_offline_pages
Current value (from the default) = false
From //components/offline_pages/buildflags/features.gni:8
Whether to enable OfflinePages support. Currently user-visible features
are Android-only.
enable_offline_pages_harness
Current value (from the default) = false
From //components/offline_pages/buildflags/features.gni:12
This enables test API for locally-built harness which is used for quality
evaluations. Requires setting this variable manually at local environment.
enable_oop_printing
Current value (from the default) = true
From //printing/buildflags/buildflags.gni:35
Enables out-of-process printing. While this definition matches
`enable_print_preview`, do not base this definition upon that. This
feature could still be appropriate for some build configurations which
explicitly disable print preview.
enable_opengl_apitrace
Current value (from the default) = false
From //build/config/ozone.gni:34
Enable explicit apitrace (https://apitrace.github.io) loading.
This requires apitrace library with additional bindings.
See ChromeOS package for details:
https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2659419
Chrome will not start without an apitrace.so library.
Trace will be saved to /tmp/gltrace.dat file by default. You can
override it at run time with TRACE_FILE=<path> environment variable.
enable_openscreen_protocol
Current value (from the default) = false
From //chrome/browser/media/router/BUILD.gn:12
Set to true to build code that supports the Open Screen Protocol.
OSP is experimental and not yet feature-complete.
enable_openxr
Current value (from the default) = false
From //device/vr/buildflags/buildflags.gni:18
To build with OpenXR support, the OpenXR Loader needs to be pulled to
third_party/openxr.
enable_paint_preview
Current value (from the default) = true
From //build/config/buildflags_paint_preview.gni:15
Enable basic paint preview support. Does not work on iOS. Should
not be included with Chromecast hardware devices.
Used by //components/paint_preview and //third_party/harfbuzz-ng.
TODO(crbug.com/webrtc/11223) Move back this file in
//components/paint_preview/ once WebRTC doesn't roll harfbuzz-ng anymore,
for consistency sake.
enable_pdf
Current value (from the default) = true
From //pdf/features.gni:20
enable_perfetto_benchmarks
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:195
enable_perfetto_fuzzers
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:198
enable_perfetto_heapprofd
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:157
enable_perfetto_integration_tests
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:193
enable_perfetto_ipc
Current value (from the default) = true
From //third_party/perfetto/gn/perfetto.gni:150
enable_perfetto_llvm_demangle
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:300
enable_perfetto_platform_services
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:141
enable_perfetto_stderr_crash_dump
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:235
enable_perfetto_tools
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:187
enable_perfetto_trace_processor
Current value (from the default) = true
From //third_party/perfetto/gn/perfetto.gni:173
enable_perfetto_trace_processor_httpd
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:287
enable_perfetto_trace_processor_json
Current value (from the default) = true
From //third_party/perfetto/gn/perfetto.gni:282
enable_perfetto_trace_processor_linenoise
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:276
enable_perfetto_trace_processor_percentile
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:272
enable_perfetto_trace_processor_sqlite
Current value (from the default) = true
From //third_party/perfetto/gn/perfetto.gni:267
enable_perfetto_traceconv
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:306
enable_perfetto_traced_perf
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:165
enable_perfetto_traced_probes
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:259
The traced_probes daemon is very Linux-specific, as it depends on ftrace and
various /proc interfaces. There is no point making its code platform-neutral
as it won't do anything useful on Windows.
The only reason why we still build it on Mac OS is to be able to run the
unittests there and making dev on mac less cumbersome. The traced_probes
code happens to build cleanly and for now the mainteinance cost on Mac is
extremely low.
enable_perfetto_tracing
Current value (from the default) = false
From //chromecast/chromecast.gni:115
Support using system perfetto tracing
enable_perfetto_ui
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:310
enable_perfetto_unittests
Current value (from the default) = true
From //third_party/perfetto/gn/perfetto.gni:189
enable_perfetto_version_gen
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:204
enable_perfetto_watchdog
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:182
enable_perfetto_x64_cpu_opt
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:243
enable_perfetto_zlib
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:293
enable_platform_ac3_eac3_audio
Current value (from the default) = false
From //media/media_options.gni:53
Enables AC3/EAC3 audio demuxing. This is enabled only on Chromecast, since
it only provides demuxing, and is only useful for AC3/EAC3 audio
pass-through to HDMI sink on Chromecast.
enable_platform_dolby_vision
Current value (from the default) = false
From //media/media_options.gni:73
Enable Dolby Vision demuxing. Enable by default for Chromecast. Actual
decoding must be provided by the platform. Note some Dolby Vision profiles
which are encoded using HEVC require |enable_platform_hevc| to be enabled.
TODO(crbug.com/1336055): Revisit the default value for this setting as it
applies to video-capable devices.
enable_platform_dts_audio
Current value (from the default) = false
From //media/media_options.gni:59
Enables DTS/DTSX audio handling in chromium. This includes demuxing,
on-device decoding and bitstream passthrough as supported by device.
enable_platform_hevc
Current value (from the default) = false
From //media/media_options.gni:116
enable_platform_mpeg_h_audio
Current value (from the default) = false
From //media/media_options.gni:55
enable_playready
Current value (from the default) = false
From //chromecast/chromecast.gni:157
Use Playready CDMs for internal non-desktop builds.
enable_plugins
Current value (from the default) = true
From //ppapi/buildflags/buildflags.gni:13
Enables basic plugin support. This enables support for registering and
looking up plugins, but does not include support for loading plugins using a
specific technology like Pepper.
enable_ppapi
Current value (from the default) = true
From //ppapi/buildflags/buildflags.gni:18
Enables Pepper API (PPAPI) plugin support.
enable_precompiled_headers
Current value (from the default) = false
From //build/config/pch.gni:14
enable_print_content_analysis
Current value (from the default) = true
From //printing/buildflags/buildflags.gni:40
enable_print_media_l10n
Current value (from the default) = false
From //chrome/common/printing/BUILD.gn:15
Enable print media localization only on the platforms that support CUPS IPP
(ChromeOS and macOS for now). The localization expects media vendor IDs
uniquely generated by CUPS IPP.
enable_print_preview
Current value (from the default) = true
From //printing/buildflags/buildflags.gni:21
Enables printing with print preview.
Print preview requires PDF per //printing/BUILD.gn.
The is_android condition is currently redundant but left for clarity.
enable_profiling
Current value (from the default) = false
From //build/config/compiler/compiler.gni:68
Compile in such a way as to enable profiling of the generated code. For
example, don't omit the frame pointer and leave in symbols.
enable_pseudolocales
Current value (from the default) = true
From //build/config/locales.gni:243
We want to give pseudolocales to everyone except end-users (devs & QA).
Note that this only packages the locales in, and doesn't add the ui to enable them.
enable_qr_print
Current value (from the default) = false
From //components/qr_code_generator/BUILD.gn:7
Enables building a development / debugging binary.
enable_random_mojo_delays
Current value (from the default) = false
From //mojo/public/cpp/bindings/BUILD.gn:18
enable_random_mojo_delays starts a task runner that periodically pauses
random Mojo bindings and later resumes them, in order to test whether parts
of the code implicitly rely on FIFO processing of messages sent on different
message pipes (which they should not).
enable_reading_list
Current value (from the default) = true
From //components/reading_list/features/reading_list.gni:8
Controls whether reading list support is active or not. Currently only
supported on iOS (on other platforms, the feature is always disabled).
enable_remoting
Current value (from the default) = true
From //remoting/remoting_enable.gni:12
enable_remoting_for_cwr
Current value (from the default) = false
From //chromecast/chromecast.gni:144
True to use the remoting implementation of cast streaming for the cast web
runtime (as opposed to the mirroring-only implementation).
enable_reporting
Current value (from the default) = true
From //net/features.gni:28
Reporting not used on iOS.
enable_resource_allowlist_generation
Current value (from the default) = false
From //build/toolchain/gcc_toolchain.gni:28
enable_rust
Current value (from the default) = false
From //build/config/rust.gni:17
Whether to allow Rust code to be part of the Chromium *build process*.
This can be used to create Rust test binaries, even if the flag below
is false.
enable_screen_ai_service
Current value (from the default) = true
From //components/services/screen_ai/buildflags/features.gni:11
enable_segment_heap
Current value (from the default) = false
From //build/config/win/manifest.gni:46
enable_service_discovery
Current value (from the default) = true
From //chrome/common/features.gni:63
enable_session_service
Current value (from the default) = true
From //chrome/common/features.gni:67
Enables use of the session service, which is enabled by default.
Android stores them separately on the Java side.
enable_skia_dawn_gtests
Current value (from the default) = false
From //skia/features.gni:13
Enable gtests using SkiaRenderer Dawn.
TODO(rivr): Remove this and enable the tests by default once a software
path for D3D12 is available.
enable_skia_wuffs_gif
Current value (from the default) = true
From //skia/BUILD.gn:30
enable_snap_package
Current value (from the default) = false
From //chrome/installer/linux/BUILD.gn:32
Enable building snap packages
enable_soda
Current value (from the default) = false
From //components/soda/buildflags.gni:7
Used to enable the Speech On-Device API (SODA) in unit and browser tests.
enable_speech_service
Current value (from the default) = true
From //chrome/services/speech/buildflags/buildflags.gni:10
Whether the browser provides a speech recognition service
(//media/mojo/mojom/speech_recognition_service.mojom) to the renderer.
enable_stack_trace_line_numbers
Current value (from the default) = false
From //build/config/logging.gni:13
enable_stripping
Current value (from the default) = false
From //build/config/apple/symbols.gni:24
Strip symbols from linked targets by default. If this is enabled, the
//build/config/mac:strip_all config will be applied to all linked targets.
If custom stripping parameters are required, remove that config from a
linked target and apply custom -Wcrl,strip flags. See
//build/toolchain/apple/linker_driver.py for more information.
enable_swiftshader
Current value (from the default) = true
From //ui/gl/features.gni:30
enable_swiftshader_vulkan
Current value (from the default) = true
From //gpu/vulkan/features.gni:17
Enable swiftshader vulkan. Disabling it can save build time, however
--use-vulkan=swiftshader and some tests which use swiftshader vulkan will
not work.
enable_system_notifications
Current value (from the default) = true
From //chrome/common/features.gni:71
enable_tagged_pdf
Current value (from the default) = true
From //printing/buildflags/buildflags.gni:45
Enables exporting to tagged PDF.
enable_trace_logging
Current value (from the default) = false
From //third_party/openscreen/src/util/BUILD.gn:11
Enables trace logging in build. This is true by default, unless
we are built against Chrome--we have no way to link their platform
implementation into our binaries so trace logging is not possible.
enable_typescript_bindings
Current value (from the default) = false
From //mojo/public/tools/bindings/mojom.gni:47
Enables generating Typescript bindings and compiling them to JS bindings.
enable_video_capture_service
Current value (from the default) = false
From //chromecast/chromecast.gni:105
Set to true to enable video capture service for video input and output.
enable_video_with_mixed_audio
Current value (from the default) = false
From //chromecast/chromecast.gni:79
Set to true to enable a CMA media backend that allows mixed audio to be
output with sync'd video.
enable_vr
Current value (from the default) = true
From //device/vr/buildflags/buildflags.gni:26
enable_vulkan
Current value (from the default) = true
From //gpu/vulkan/features.gni:12
enable_wayland_server
Current value (from the default) = false
From //chrome/common/features.gni:74
Indicates if Wayland display server support is enabled.
enable_websockets
Current value (from the default) = true
From //net/features.gni:13
WebSockets and socket stream code are not used on iOS and are optional in
cronet.
enable_webui_certificate_viewer
Current value (from the default) = true
From //chrome/common/features.gni:77
Enables the webui certificate viewer dialog.
enable_webui_inline_sourcemaps
Current value (from the default) = false
From //ui/webui/webui_features.gni:18
Whether to inline source maps during build. This is an experimental feature
currently only being used for New Tab Page being tracked at crbug/1337530.
enable_webui_tab_strip
Current value (from the default) = true
From //ui/webui/webui_features.gni:14
Enable the WebUI version of the browser's tab strip.
enable_widevine
Current value (from the default) = false
From //third_party/widevine/cdm/widevine.gni:15
Enables Widevine key system support. Enabled by default in Google Chrome,
on Android and Fuchsia platforms.
Can be optionally enabled in Chromium on non-Android platforms. Please see
//src/third_party/widevine/LICENSE file for details.
enable_wmax_tokens
Current value (from the default) = true
From //build/config/compiler/BUILD.gn:154
enable_xz_extractor
Current value (from the default) = true
From //chrome/services/file_util/public/features.gni:11
Whether the file_util service supports .xz file extraction.
Currently only used by imageWriterPrivate extension API, so only enabled
when Extensions are enabled.
exclude_unwind_tables
Current value (from the default) = false
From //build/config/compiler/compiler.gni:123
Exclude unwind tables by default for official builds as unwinding can be
done from stack dumps produced by Crashpad at a later time "offline" in the
crash server. Since this increases binary size, we don't recommend including
them in shipping builds.
For unofficial (e.g. development) builds and non-Chrome branded (e.g. Cronet
which doesn't use Crashpad, crbug.com/479283) builds it's useful to be able
to unwind at runtime.
Include the unwind tables on Android even for official builds, as otherwise
the crash dumps generated by Android's debuggerd are largely useless, and
having this additional mechanism to understand issues is particularly helpful
to WebView.
extended_tracing_enabled
Current value (from the default) = false
From //base/trace_event/tracing.gni:11
Enable more trace events. Disabled by default due to binary size impact,
but highly recommended for local development.
fatal_linker_warnings
Current value (from the default) = true
From //build/config/compiler/BUILD.gn:75
Enable fatal linker warnings. Building Chromium with certain versions
of binutils can cause linker warning.
ffmpeg_branding
Current value = "Chrome"
From //out/Default/args.gn:4
Overridden from the default = "Chromium"
From //third_party/ffmpeg/ffmpeg_options.gni:32
Controls whether we build the Chromium or Google Chrome version of FFmpeg.
The Google Chrome version contains additional codecs. Typical values are
Chromium, Chrome, and ChromeOS.
ffmpeg_use_unsafe_atomics
Current value (from the default) = false
From //third_party/ffmpeg/ffmpeg_options.gni:50
Set to true to force the use of ffmpeg's stdatomic fallback code. This code
is unsafe and does not implement atomics properly. https://crbug.com/161723.
Windows and GCC prior to 4.9 lack stdatomic.h.
This is also useful for developers who use icecc, which relies upon
clang's -frewrite-includes flag which is broken with #include_next
directives as used in chromium's clang stdatomic.h.
Some background: https://bugs.llvm.org/show_bug.cgi?id=26828
forbid_non_component_debug_builds
Current value (from the default) = true
From //build/config/compiler/compiler.gni:110
Whether an error should be raised on attempts to make debug builds with
is_component_build=false. Very large debug symbols can have unwanted side
effects so this is enforced by default for chromium.
force_cast_bluetooth
Current value (from the default) = false
From //device/bluetooth/cast_bluetooth.gni:4
from_here_uses_location_builtins
Current value (from the default) = true
From //base/BUILD.gn:55
Whether or not the FROM_HERE macro uses base::Location::Current().
gcc_target_rpath
Current value (from the default) = ""
From //build/config/gcc/BUILD.gn:19
When non empty, overrides the target rpath value. This allows a user to
make a Chromium build where binaries and shared libraries are meant to be
installed into separate directories, like /usr/bin/chromium and
/usr/lib/chromium for instance. It is useful when a build system that
generates a whole target root filesystem (like Yocto) is used on top of gn,
especially when cross-compiling.
Note: this gn arg is similar to gyp target_rpath generator flag.
generate_fuzzer_owners
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:166
Generates an owners file for each fuzzer test.
TODO(crbug.com/1194183): Remove this arg when finding OWNERS is faster.
generate_linker_map
Current value (from the default) = false
From //build/toolchain/toolchain.gni:21
Used for binary size analysis.
gold_path
Current value (from the default) = ""
From //build/config/compiler/BUILD.gn:71
When we are going to use gold we need to find it.
This is initialized below, after use_gold might have been overridden.
goma_dir
Current value (from the default) = ""
From //build/toolchain/goma.gni:17
Absolute directory containing the gomacc binary.
google_api_key
Current value (from the default) = ""
From //google_apis/BUILD.gn:43
Set these to bake the specified API keys and OAuth client
IDs/secrets into your build.
If you create a build without values baked in, you can instead
set environment variables to provide the keys at runtime (see
src/google_apis/google_api_keys.h for details). Features that
require server-side APIs may fail to work if no keys are
provided.
Note that when building a Chrome-branded build or if
`use_official_google_api_keys` has been set to `true` (explicitly or
implicitly), these values will be ignored and the official
keys will be used instead.
google_default_client_id
Current value (from the default) = ""
From //google_apis/BUILD.gn:46
See google_api_key.
google_default_client_secret
Current value (from the default) = ""
From //google_apis/BUILD.gn:49
See google_api_key.
grpc_use_static_linking
Current value (from the default) = false
From //third_party/grpc/BUILD.gn:17
TODO(169395837): Somehow gRPC symbols cannot be found on Android.
Keep using static linking for now.
In windows and mac use static linking.
Use static linking on Chrome OS as a workaround for the symbol lookup
error(crbug/1241330) due to a gRPC version mismatch between what Chrome
uses and what CrOS provides.
gtest_enable_absl_printers
Current value (from the default) = true
From //build_overrides/build.gni:39
Allows googletest to pretty-print various absl types. Disabled for nacl due
to lack of toolchain support.
gtk_version
Current value (from the default) = 3
From //build/config/linux/gtk/gtk.gni:13
The (major) version of GTK to build against. A different version may be
loaded at runtime.
has_native_accessibility
Current value (from the default) = true
From //ui/base/ui_features.gni:18
Whether the platform provides a native accessibility toolkit, in other words
the platform has a C/C++ interface for accessibility that Chrome
implements/subclasses in some way - win, mac, linux.
has_platform_accessibility_support
Current value (from the default) = false
From //ui/base/ui_features.gni:26
Whether the platform provide platform-specific accessibility implementation,
i.e. there an accessibility API of some kind on this platform that's
implemented in Chrome's browser process, but not necessarily something that
looks like subclassing an interface - so that includes Android (the Java
AccessibilityNodeProvider API) and Fuchsia (uses fidl messaging, kind of
like mojo).
have_full_mixer
Current value (from the default) = false
From //chromecast/chromecast.gni:51
Set to true if there is a full mixer implementation; if not, we create a
shim mixer service receiver that pushes audio to the CMA backend.
headless_mode_policy_supported
Current value (from the default) = true
From //headless/headless.gni:16
Platforms where headless mode is supported.
headless_use_embedded_resources
Current value (from the default) = false
From //headless/headless.gni:7
Embed resource.pak file into the binary for easier distribution.
headless_use_policy
Current value (from the default) = true
From //headless/headless.gni:13
Use Policy component to manage preferences.
headless_use_prefs
Current value (from the default) = true
From //headless/headless.gni:10
Use Prefs component to access Local State and other preferences.
host_byteorder
Current value (from the default) = "undefined"
From //build/config/host_byteorder.gni:9
host_cpu
Current value (from the default) = "x64"
(Internally set; try `gn help host_cpu`.)
host_os
Current value (from the default) = "linux"
(Internally set; try `gn help host_os`.)
host_pkg_config
Current value (from the default) = ""
From //build/config/linux/pkg_config.gni:36
A optional pkg-config wrapper to use for tools built on the host.
host_toolchain
Current value (from the default) = ""
From //build/config/BUILDCONFIG.gn:151
This should not normally be set as a build argument. It's here so that
every toolchain can pass through the "global" value via toolchain_args().
icu_disable_thin_archive
Current value (from the default) = false
From //third_party/icu/config.gni:17
If true, compile icu into a standalone static library. Currently this is
only useful on Chrome OS.
icu_fuchsia_override_data_dir
Current value (from the default) = ""
From //third_party/icu/config.gni:22
If set to nonempty, this is the label of the directory to be used to pull
the ICU data files content. The setting has effect only when building
inside the Fuchsia source tree.
icu_use_data_file
Current value (from the default) = true
From //third_party/icu/config.gni:8
Tells icu to load an external data file rather than rely on the icudata
being linked directly into the binary.
icu_use_stub_data
Current value (from the default) = true
From //third_party/icu/config.gni:13
If true, then this creates a stub data file. This should be disabled if
a custom data file will be used instead, in order to avoid conflicting
symbols.
ignore_missing_widevine_signing_cert
Current value (from the default) = true
From //third_party/widevine/cdm/widevine.gni:81
If set, and Widevine CDM host verification signing failed due to no signing
cert, the failure will be ignored. Otherwise the build process will fail.
Set to false by default for official build to catch missing cert error.
For developers building with "is_official_build" locally without Widevine
signing certs, please manually set `ignore_missing_widevine_signing_cert`
to true to suppress the error.
include_ash_ambient_animation_resources
Current value (from the default) = false
From //ash/ambient/resources/resources.gni:16
Build flag to include resources for the animated screensaver in ash builds.
Currently, these resources are included by default for internal ChromeOS
builds as both conditions below are prerequisites for downloading Lottie
ambient mode resources from CIPD in the DEPS file.
May be overridden locally to false for testing purposes if desired.
include_transport_security_state_preload_list
Current value (from the default) = true
From //net/features.gni:36
Includes the transport security state preload list. This list includes
mechanisms (e.g. HSTS, HPKP) to enforce trusted connections to a significant
set of hardcoded domains. While this list has a several hundred KB of binary
size footprint, this flag should not be disabled unless the embedder is
willing to take the responsibility to make sure that all important
connections use HTTPS.
include_vr_data
Current value (from the default) = false
From //device/vr/buildflags/buildflags.gni:30
Whether to include VR extras like test APKs in non-VR-specific targets
init_stack_vars
Current value (from the default) = true
From //build/config/compiler/BUILD.gn:140
Initialize all local variables with a pattern. This flag will fill
uninitialized floating-point types (and 32-bit pointers) with 0xFF and the
rest with 0xAA. This makes behavior of uninitialized memory bugs consistent,
recognizable in the debugger, and crashes on memory accesses through
uninitialized pointers.
TODO(crbug.com/1131993): Enabling this when 'is_android' is true breaks
content_shell_test_apk on both ARM and x86.
internal_gles2_conform_tests
Current value (from the default) = false
From //gpu/gles2_conform_support/BUILD.gn:7
Set to true to compile with the OpenGL ES 2.0 conformance tests.
internal_khronos_glcts_tests
Current value (from the default) = false
From //gpu/khronos_glcts_support/BUILD.gn:8
invert_fieldtrials
Current value (from the default) = false
From //components/variations/field_trial_config/BUILD.gn:8
ios_deployment_target
Current value (from the default) = "14.0"
From //build/config/ios/ios_sdk_overrides.gni:10
Version of iOS that we're targeting.
ios_stack_profiler_enabled
Current value (from the default) = true
From //base/BUILD.gn:73
Control whether the ios stack sampling profiler is enabled. This flag is
only supported on iOS 64-bit architecture, but some project build //base
for 32-bit architecture.
iot_service_rpath
Current value (from the default) = ""
From //chromecast/chromecast.gni:127
Extra rpath to use for standalone services.
is_android_arc
Current value (from the default) = false
From //chromecast/chromecast.gni:62
Set to true for builds targeting ARC.
is_asan
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:14
Compile for Address Sanitizer to find memory bugs.
is_cast_android
Current value (from the default) = false
From //build/config/chromecast_build.gni:62
Set this to true to build for Android-based Cast devices.
Set this to false to use the defaults for the target OS/platform.
is_cast_audio_only
Current value (from the default) = false
From //build/config/chromecast_build.gni:26
Set this true for an audio-only Chromecast build.
TODO(crbug.com/1293538): Replace with a buildflag for speaker-only builds not
specific to Cast.
is_cast_desktop_build
Current value (from the default) = false
From //chromecast/chromecast.gni:20
is_castos
Current value (from the default) = false
From //build/config/chromecast_build.gni:58
Set this to true to build for Nest hardware running Linux (aka "CastOS").
Set this to false to use the defaults for the target OS/platform.
Prevent it from being true for the building of host tools when the target
is Fuchsia. is_a_target_toolchain could be checked instead, but this would
be a change in behavior.
TODO(crbug.com/1340117): Migrate to NOT setting is_castos to true in the
host toolchain even after the following TODO is addressed.
TODO(crbug.com/1314528): Change default to false.
is_cfi
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:53
Compile with Control Flow Integrity to protect virtual calls and casts.
See http://clang.llvm.org/docs/ControlFlowIntegrity.html
TODO(pcc): Remove this flag if/when CFI is enabled in all official builds.
is_cfm
Current value (from the default) = false
From //build/config/chromebox_for_meetings/buildflags.gni:7
True if compiling for Chromebox for Meeting devices.
is_chrome_branded
Current value (from the default) = false
From //build/config/chrome_build.gni:9
Select the desired branding flavor. False means normal Chromium branding,
true means official Google Chrome branding (requires extra Google-internal
resources).
is_chromecast
Current value (from the default) = false
From //build/config/chromecast_build.gni:16
DEPRECATED. This flag will be removed in the future; see https://crbug.com/1219802.
New code should use enable_cast_receiver if the feature in question is
required for all Cast-enabled browsers, or an alternative buildflag if it is
for specific types of devices.
is_chromeos_device
Current value (from the default) = false
From //build/config/chromeos/args.gni:26
Determines if we're building for a Chrome OS device (or VM) and not just
linux-chromeos. NOTE: Most test targets in Chrome expect to run under
linux-chromeos, so some have compile-time asserts that intentionally fail
when this build flag is set. Build and run the tests for linux-chromeos
instead.
https://chromium.googlesource.com/chromium/src/+/main/docs/chromeos_build_instructions.md
https://chromium.googlesource.com/chromiumos/docs/+/main/simple_chrome_workflow.md
is_chromeos_with_hw_details
Current value (from the default) = false
From //build/config/chromeos/args.gni:34
Determines if we collect hardware information in chrome://system and
feedback logs. A similar build flag "hw_details" is defined in Chrome OS
(see https://crrev.com/c/3123455).
is_clang
Current value (from the default) = true
From //build/config/BUILDCONFIG.gn:139
Set to true when compiling with the Clang compiler.
is_component_build
Current value (from the default) = false
From //build/config/BUILDCONFIG.gn:168
Component build. Setting to true compiles targets declared as "components"
as shared libraries loaded dynamically. This speeds up development time.
When false, components will be linked statically.
For more information see
https://chromium.googlesource.com/chromium/src/+/main/docs/component_build.md
is_component_ffmpeg
Current value = true
From //out/Default/args.gn:2
Overridden from the default = false
From //third_party/ffmpeg/ffmpeg_options.gni:39
Set true to build ffmpeg as a shared library. NOTE: this means we should
always consult is_component_ffmpeg instead of is_component_build for
ffmpeg targets. This helps linux chromium packagers that swap out our
ffmpeg.so with their own. See discussion here
https://groups.google.com/a/chromium.org/forum/#!msg/chromium-packagers/R5rcZXWxBEQ/B6k0zzmJbvcJ
is_cronet_build
Current value (from the default) = false
From //build/config/ios/config.gni:16
Control whether cronet is built (this is usually set by the script
components/cronet/tools/cr_cronet.py as cronet requires specific
gn args to build correctly).
is_ct_supported
Current value (from the default) = true
From //services/network/public/cpp/features.gni:10
Certificate transparency is not supported on iOS.
TODO(mmenke): It's actually not supported on Android, either.
is_debug
Current value = false
From //out/Default/args.gn:1
Overridden from the default = true
From //build/config/BUILDCONFIG.gn:158
Debug build. Enabling official builds automatically sets is_debug to false.
is_ggp
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:8
is_hwasan
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:19
Compile for Hardware-Assisted Address Sanitizer to find memory bugs
(android/arm64 only).
See http://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html
is_lsan
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:22
Compile for Leak Sanitizer to find leaks.
is_msan
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:25
Compile for Memory Sanitizer to find uninitialized reads.
is_nacl_glibc
Current value (from the default) = false
From //build/config/nacl/config.gni:12
True if nacl_glibc is used.
is_nacl_saigo
Current value (from the default) = false
From //build/config/nacl/config.gni:15
True if saigo_newlib is used.
is_official_build
Current value (from the default) = false
From //build/config/BUILDCONFIG.gn:136
Set to enable the official build level of optimization. This has nothing
to do with branding, but enables an additional level of optimization above
release (!is_debug). This might be better expressed as a tri-state
(debug, release, official) but for historical reasons there are two
separate flags.
IMPORTANT NOTE: (!is_debug) is *not* sufficient to get satisfying
performance. In particular, DCHECK()s are still enabled for release builds,
which can halve overall performance, and do increase memory usage. Always
set "is_official_build" to true for any build intended to ship to end-users.
is_on_release_branch
Current value (from the default) = false
From //v8/gni/release_branch_toggle.gni:6
is_p2p_enabled
Current value (from the default) = true
From //services/network/public/cpp/features.gni:16
Controls whether P2P is exposed by the network service.
Optional to reduce avoid having Chrome on iOS depends on
WebRTC and related third-party libraries (libvpx, libaom,
...).
is_perfetto_build_generator
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:82
All the tools/gen_* scripts set this to true. This is mainly used to locate
.gni files from //gn rather than //build.
is_perfetto_embedder
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:87
This is for override via `gn args` (e.g. for tools/gen_xxx). Embedders
based on GN (e.g. v8) should NOT set this and instead directly sets
perfetto_build_with_embedder=true in their GN files.
is_reven
Current value (from the default) = false
From //build/config/chromeos/args.gni:40
Refers to the separate branding required for the reven build.
is_skylab
Current value (from the default) = false
From //build/config/chromeos/args.gni:29
Determines if we run the test in skylab, aka the CrOS labs.
is_tsan
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:28
Compile for Thread Sanitizer to find threading bugs.
is_ubsan
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:32
Compile for Undefined Behaviour Sanitizer to find various types of
undefined behaviour (excludes vptr checks).
is_ubsan_no_recover
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:35
Halt the program if a problem is detected.
is_ubsan_null
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:38
Compile for Undefined Behaviour Sanitizer's null pointer checks.
is_ubsan_security
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:82
Enables core ubsan security features. Will later be removed once it matches
is_ubsan.
is_ubsan_vptr
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:118
Compile for Undefined Behaviour Sanitizer's vptr checks.
is_unsafe_developer_build
Current value (from the default) = true
From //base/BUILD.gn:60
Unsafe developer build. Has developer-friendly features that may weaken or
disable security measures like sandboxing or ASLR.
IMPORTANT: Unsafe developer builds should never be distributed to end users.
is_win_arm64
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:123
Currently Windows on Arm doesn't support OpenGL or Vulkan.
jsoncpp_no_deprecated_declarations
Current value (from the default) = true
From //third_party/jsoncpp/BUILD.gn:11
Allow individual projects to remove the warning suppression
by overriding this in their .gn file or through custom args.gn
See crbug.com/983223
ldso_path
Current value (from the default) = ""
From //build/config/gcc/BUILD.gn:20
libcxx_is_shared
Current value (from the default) = false
From //build/config/c++/c++.gni:55
WARNING: Setting this to a non-default value is highly discouraged.
If true, libc++ will be built as a shared library; otherwise libc++ will be
linked statically. Setting this to something other than the default is
unsupported and can be broken by libc++ rolls. Note that if this is set to
true, you must also set libcxx_abi_unstable=false, which is bad for
performance and memory use.
libcxx_natvis_include
Current value (from the default) = true
From //build/config/c++/c++.gni:30
Builds libcxx Natvis into the symbols for type visualization.
Set to false to workaround http://crbug.com/966676 and
http://crbug.com/966687.
libcxx_revision
Current value (from the default) = "88bf4070487fbe9020697a2281743b91e5e29bef"
From //buildtools/deps_revisions.gni:8
Used to cause full rebuilds on libc++ rolls. This should be kept in sync
with the libcxx_revision vars in //DEPS.
libyuv_disable_jpeg
Current value (from the default) = false
From //third_party/libyuv/libyuv.gni:15
libyuv_include_tests
Current value (from the default) = false
From //third_party/libyuv/libyuv.gni:14
libyuv_symbols_visible
Current value (from the default) = false
From //third_party/libyuv/BUILD.gn:19
When building a shared library using a target in WebRTC or
Chromium projects that depends on libyuv, setting this flag
to true makes libyuv symbols visible inside that library.
libyuv_use_absl_flags
Current value (from the default) = true
From //third_party/libyuv/BUILD.gn:14
Set to false to disable building with absl flags.
libyuv_use_mmi
Current value (from the default) = false
From //third_party/libyuv/libyuv.gni:22
libyuv_use_msa
Current value (from the default) = false
From //third_party/libyuv/libyuv.gni:20
libyuv_use_neon
Current value (from the default) = false
From //third_party/libyuv/libyuv.gni:17
limit_android_deps
Current value (from the default) = false
From //build_overrides/build.gni:35
Limits the defined //third_party/android_deps targets to only "buildCompile"
and "buildCompileNoDeps" targets. This is useful for third-party
repositories which do not use JUnit tests. For instance,
limit_android_deps == true removes "gn gen" requirement for
//third_party/robolectric .
link_pulseaudio
Current value (from the default) = false
From //media/media_options.gni:23
Allows distributions to link pulseaudio directly (DT_NEEDED) instead of
using dlopen. This helps with automated detection of ABI mismatches and
prevents silent errors.
lld_path
Current value (from the default) = "../../third_party/llvm-build/Release+Asserts/bin"
From //build/config/compiler/BUILD.gn:50
This allows overriding the location of lld.
llvm_force_head_revision
Current value (from the default) = false
From //build/toolchain/toolchain.gni:18
If this is set to true, we use the revision in the llvm repo to determine
the CLANG_REVISION to use, instead of the version hard-coded into
//tools/clang/scripts/update.py. This should only be used in
conjunction with setting the llvm_force_head_revision DEPS variable when
`gclient runhooks` is run as well.
mac_sdk_min
Current value (from the default) = "10.15"
From //build/config/mac/mac_sdk_overrides.gni:12
make_partition_alloc_standalone
Current value (from the default) = false
From //base/allocator/partition_allocator/partition_alloc.gni:6
mbi_mode
Current value (from the default) = true
From //content/common/features.gni:18
Whether or not MBI mode (Multiple Blink Isolates) should be enabled,
depending on the build argument.
media_clock_monotonic_raw
Current value (from the default) = true
From //chromecast/chromecast.gni:82
unified flag to pick monotonic_clock OR monotonic_clock_raw
media_use_ffmpeg
Current value (from the default) = true
From //media/media_options.gni:28
Enable usage of FFmpeg within the media library. Used for most software
based decoding, demuxing, and sometimes optimized FFTs. If disabled,
implementors must provide their own demuxers and decoders.
media_use_libvpx
Current value (from the default) = true
From //media/media_options.gni:32
Enable usage of libvpx within the media library. Used for software based
decoding of VP9 and VP8A type content.
media_use_openh264
Current value (from the default) = true
From //media/media_options.gni:42
Enable usage of OpenH264 within the media library. Used for software based
encoding of H264 content.
mips_use_mmi
Current value (from the default) = false
From //build/config/mips.gni:13
MIPS MultiMedia Instruction compilation flag.
mixer_in_cast_shell
Current value (from the default) = true
From //chromecast/chromecast.gni:55
If true, the mixer will be instantiated inside cast_shell. When false, the
mixer is expected to be running in another process.
mojo_media_host
Current value (from the default) = "gpu"
From //media/media_options.gni:287
The process that the mojo MediaService runs in. By default, all services
registered in |mojo_media_services| are hosted in the MediaService, with the
exception that when |enable_library_cdms| is true, the "cdm" service will
run in a separate CdmService in the CDM (utility) process, while other
|mojo_media_services| still run in the MediaService in the process specified
by "mojo_media_host".
Valid options are:
- "browser": Use mojo media service hosted in the browser process.
- "gpu": Use mojo media service hosted in the gpu process.
- "": Do not use mojo media service.
mojo_media_services
Current value (from the default) = ["video_decoder", "cdm"]
From //media/media_options.gni:275
A list of mojo media services that should be used in the media pipeline.
Valid entries in the list are:
- "renderer": Use mojo-based media Renderer service.
- "cdm": Use mojo-based Content Decryption Module.
- "audio_decoder": Use mojo-based audio decoder in the default media
Renderer. Cannot be used with the mojo Renderer above.
- "video_decoder": Use mojo-based video decoder in the default media
Renderer. Cannot be used with the mojo Renderer above.
mojom_message_id_salt_path
Current value (from the default) = "//chrome/VERSION"
From //mojo/public/tools/bindings/mojom.gni:116
The path to a file whose contents can be used as the basis for a message
ID scrambling salt.
monolithic_binaries
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:214
Only for local development. When true the binaries (perfetto, traced, ...)
are monolithic and don't use a common shared library. This is mainly to
avoid LD_LIBRARY_PATH dances when testing locally.
On Windows we default to monolithic executables, because pairing
dllexport/import adds extra complexity for little benefit. Te only reason
for monolithic_binaries=false is saving binary size, which matters mainly on
Android. See also comments on PERFETTO_EXPORT_ENTRYPOINT in compiler.h.
msan_track_origins
Current value (from the default) = 2
From //build/config/sanitizers/sanitizers.gni:43
Track where uninitialized memory originates from. From fastest to slowest:
0 - no tracking, 1 - track only the initial allocation site, 2 - track the
chain of stores leading from allocation site to use site.
msvc_use_sse2
Current value (from the default) = true
From //third_party/pdfium/pdfium.gni:69
Enable SSE2 for MSVC builds. Ignored if it's not a MSVC build.
nacl_sdk_untrusted
Current value (from the default) = false
From //native_client_sdk/src/BUILD.gn:14
Build the nacl SDK untrusted components. This is disabled by default since
not all NaCl untrusted compilers are in goma (e.g arm-nacl-glibc)
ndk_api_level_at_least_26
Current value (from the default) = false
From //third_party/angle/gni/angle.gni:102
needs_gomacc_path_arg
Current value (from the default) = false
From //build/toolchain/goma.gni:14
This flag is for ChromeOS compiler wrapper.
By passing gomacc path via cmd-line arg, ChromeOS' compiler wrapper
invokes gomacc inside it.
optimize_for_fuzzing
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:90
Optimize for coverage guided fuzzing (balance between speed and number of
branches). Can be also used to remove non-determinism and other issues.
optimize_for_size
Current value (from the default) = false
From //build/config/compiler/compiler.gni:138
If true, optimize for size.
Default to favoring speed over size for platforms not listed below.
optimize_webui
Current value (from the default) = true
From //ui/webui/webui_features.gni:11
Optimize parts of Chrome's UI written with web technologies (HTML/CSS/JS)
for runtime performance purposes. This does more work at compile time for
speed benefits at runtime (so we skip in debug builds).
optional_trace_events_enabled
Current value (from the default) = true
From //base/trace_event/tracing.gni:20
ozone_auto_platforms
Current value (from the default) = true
From //build/config/ozone.gni:21
Select platforms automatically. Turn this off for manual control.
ozone_extra_path
Current value (from the default) = "//build/config/ozone_extra.gni"
From //build/config/ozone.gni:18
Ozone extra platforms file path. Can be overridden to build out of
tree ozone platforms.
ozone_platform
Current value (from the default) = "x11"
From //build/config/ozone.gni:91
ozone_platform_cast
Current value (from the default) = false
From //build/config/ozone.gni:43
Compile the 'cast' platform.
ozone_platform_drm
Current value (from the default) = false
From //build/config/ozone.gni:46
Compile the 'drm' platform.
ozone_platform_flatland
Current value (from the default) = false
From //build/config/ozone.gni:55
Compile the 'flatland' platform.
ozone_platform_gbm
Current value (from the default) = -1
From //build/config/ozone.gni:25
TODO(petermcneeley): Backwards compatiblity support for VM images.
Remove when deprecated. (https://crbug.com/1122009)
ozone_platform_headless
Current value (from the default) = true
From //build/config/ozone.gni:66
ozone_platform_scenic
Current value (from the default) = false
From //build/config/ozone.gni:52
Compile the 'scenic' platform.
ozone_platform_wayland
Current value (from the default) = true
From //build/config/ozone.gni:92
ozone_platform_x11
Current value (from the default) = true
From //build/config/ozone.gni:93
pdf_bundle_freetype
Current value (from the default) = false
From //third_party/pdfium/pdfium.gni:16
Build PDFium either:
1) When set to true, with a bundled FreeType, built from FreeType source
code in //third_party/freetype and PDFium's FreeType configs in
third_party/freetype/include.
2) When set to false, use whatever FreeType target is defined in
//build/config/freetype.
pdf_enable_click_logging
Current value (from the default) = false
From //third_party/pdfium/pdfium.gni:19
Generate logging messages for click events that reach PDFium
pdf_enable_v8
Current value (from the default) = true
From //third_party/pdfium/pdfium.gni:22
Build PDFium either with or without v8 support.
pdf_enable_xfa
Current value (from the default) = true
From //third_party/pdfium/pdfium.gni:25
Build PDFium either with or without XFA Forms support.
pdf_enable_xfa_bmp
Current value (from the default) = true
From //third_party/pdfium/pdfium.gni:28
If XFA, also support bmp codec. Ignored if not XFA.
pdf_enable_xfa_gif
Current value (from the default) = true
From //third_party/pdfium/pdfium.gni:31
If XFA, also support gif codec. Ignored if not XFA.
pdf_enable_xfa_png
Current value (from the default) = true
From //third_party/pdfium/pdfium.gni:34
If XFA, also support png codec. Ignored if not XFA.
pdf_enable_xfa_tiff
Current value (from the default) = true
From //third_party/pdfium/pdfium.gni:37
If XFA, also support tiff codec. Ignored if not XFA.
pdf_is_complete_lib
Current value (from the default) = false
From //third_party/pdfium/pdfium.gni:51
Build a complete static library
pdf_is_standalone
Current value (from the default) = false
From //third_party/pdfium/pdfium.gni:48
Build PDFium standalone
pdf_use_skia
Current value (from the default) = false
From //third_party/pdfium/pdfium.gni:41
Build PDFium against Skia (experimental) rather than AGG. Use Skia to draw
everything.
pdf_use_skia_paths
Current value (from the default) = false
From //third_party/pdfium/pdfium.gni:45
Build PDFium against Skia (experimental) rather than AGG. Use Skia to draw
paths.
perfetto_build_with_android
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:78
The Android blueprint file generator set this to true (as well as
is_perfetto_build_generator). This is just about being built in the
Android tree (AOSP and internal) and is NOT related with the target OS.
In standalone Android builds and Chromium Android builds, this is false.
perfetto_enable_git_rev_version_header
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:249
perfetto_force_dcheck
Current value (from the default) = ""
From //third_party/perfetto/gn/perfetto.gni:229
Whether DCHECKs should be enabled or not. Values: "on" | "off" | "".
By default ("") DCHECKs are enabled only:
- If DCHECK_ALWAYS_ON is defined (which is mainly a Chromium-ism).
- On debug builds (i.e. if NDEBUG is NOT defined) but only in Chromium,
Android and standalone builds.
- On all other builds (e.g., SDK) it's off regardless of NDEBUG (unless
DCHECK_ALWAYS_ON is defined).
See base/logging.h for the implementation of all this.
perfetto_force_dlog
Current value (from the default) = "off"
From //third_party/perfetto/gn/perfetto.gni:219
Whether DLOG should be enabled on debug builds (""), all builds ("on"), or
none ("off"). We disable it by default for embedders to avoid spamming their
console.
perfetto_use_system_protobuf
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:318
Used by CrOS system builds. Uses the system version of protobuf
from /usr/include instead of the hermetic one.
perfetto_use_system_zlib
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:320
perfetto_verbose_logs_enabled
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:263
pgo_data_path
Current value (from the default) = ""
From //build/config/compiler/pgo/pgo.gni:32
When using chrome_pgo_phase = 2, read profile data from this path.
pkg_config
Current value (from the default) = ""
From //build/config/linux/pkg_config.gni:33
A pkg-config wrapper to call instead of trying to find and call the right
pkg-config directly. Wrappers like this are common in cross-compilation
environments.
Leaving it blank defaults to searching PATH for 'pkg-config' and relying on
the sysroot mechanism to find the right .pc files.
print_unsymbolized_stack_traces
Current value (from the default) = false
From //base/third_party/symbolize/BUILD.gn:13
Stack traces will not include function names. Instead they will contain
file and offset information that can be used with
tools/valgrind/asan/asan_symbolize.py. By piping stderr through this script,
and also enabling symbol_level = 2, you can get much more detailed stack
traces with file names and line numbers, even in non-ASAN builds.
proprietary_codecs
Current value = true
From //out/Default/args.gn:3
Overridden from the default = false
From //build/config/features.gni:31
Enables proprietary codecs and demuxers; e.g. H264, AAC, MP3, and MP4.
We always build Google Chrome and Chromecast with proprietary codecs.
Note: this flag is used by WebRTC which is DEPSed into Chrome. Moving it
out of //build will require using the build_overrides directory.
Do not add any other conditions to the following line.
TODO(crbug.com/1314528): Remove chromecast-related conditions and force
builds to explicitly specify this.
put_ref_count_in_previous_slot
Current value (from the default) = true
From //base/allocator/allocator.gni:107
If BRP is enabled, additional options are available:
- put_ref_count_in_previous_slot: place the ref-count at the end of the
previous slot (or in metadata if a slot starts on the page boundary), as
opposed to the beginning of the slot.
- enable_backup_ref_ptr_slow_checks: enable additional safety checks that
are too expensive to have on by default.
- enable_dangling_raw_ptr_checks: enable checking raw_ptr do not become
dangling during their lifetime.
rbe_cc_cfg_file
Current value (from the default) = ""
From //build/toolchain/rbe.gni:20
Set to the path of the RBE reclient configuration file.
rbe_cfg_dir
Current value (from the default) = "../../buildtools/reclient_cfgs"
From //build/toolchain/rbe.gni:17
The directory where the re-client configuration files are.
rbe_cros_cc_wrapper
Current value (from the default) = "../../buildtools/reclient/rewrapper"
From //build/toolchain/rbe.gni:23
Set to the path of the RBE recleint wrapper for ChromeOS.
regenerate_x11_protos
Current value (from the default) = false
From //ui/gfx/x/BUILD.gn:12
remoting_use_wayland
Current value (from the default) = false
From //remoting/build/config/remoting_features.gni:8
Determines whether or not remoting should use wayland implementation
to talk to remote host.
remoting_webrtc_verbose_logging
Current value (from the default) = false
From //remoting/build/config/remoting_logging.gni:13
Enabling this will cause WebRTC's LS_INFO and LS_VERBOSE (level 1)
messages to appear in the debug log output. Note that WebRTC's
"VERBOSE1" messages are very spammy and it is impossible to
separately filter LS_INFO and LS_VERBOSE messages (see
third_party/webrtc_overrides/rtc_base/). So a separate GN option is
provided here, to allow this logging to be quickly enabled for Debug
or Release builds.
removed_rust_stdlib_libs
Current value (from the default) = []
From //build/config/rust.gni:48
Any removed std rlibs in your Rust toolchain, relative to the standard
Rust toolchain. Typically used with 'use_unverified_rust_toolchain' = true
root_extra_deps
Current value (from the default) = []
From //BUILD.gn:53
A list of extra dependencies to add to the root target. This allows a
checkout to add additional targets without explicitly changing any checked-
in files.
rtc_audio_device_plays_sinus_tone
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:191
When set to true, replace the audio output with a sinus tone at 440Hz.
The ADM will ask for audio data from WebRTC but instead of reading real
audio samples from NetEQ, a sinus tone will be generated and replace the
real audio samples.
rtc_build_dcsctp
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:307
Enable the dcsctp backend for DataChannels and related unittests
rtc_build_examples
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:126
Set this to false to skip building examples.
rtc_build_json
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:247
Disable these to not build components which can be externally provided.
rtc_build_libevent
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:261
rtc_build_libsrtp
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:248
rtc_build_libvpx
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:249
rtc_build_opus
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:251
rtc_build_ssl
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:252
rtc_build_tools
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:129
Set this to false to skip building tools.
rtc_build_with_neon
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:165
rtc_builtin_ssl_root_certificates
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:88
Setting this to false will require the API user to pass in their own
SSLCertificateVerifier to verify the certificates presented from a
TLS-TURN server. In return disabling this saves around 100kb in the binary.
rtc_disable_check_msg
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:295
Set this to true to disable detailed error message and logging for
RTC_CHECKs.
rtc_disable_logging
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:288
Set this to true to fully remove logging from WebRTC.
rtc_disable_metrics
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:298
Set this to true to disable webrtc metrics.
rtc_disable_trace_events
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:291
Set this to true to disable trace events.
rtc_dlog_always_on
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:51
Setting this to true, will make RTC_DLOG() expand to log statements instead
of being removed by the preprocessor.
This is useful for example to be able to get RTC_DLOGs on a release build.
rtc_enable_android_aaudio
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:148
Experimental: enable use of Android AAudio which requires Android SDK 26 or above
and NDK r16 or above.
rtc_enable_avx2
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:274
rtc_enable_bwe_test_logging
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:123
Set this to true to enable BWE test logging.
rtc_enable_external_auth
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:113
Enable when an external authentication mechanism is used for performing
packet authentication for RTP packets instead of libsrtp.
rtc_enable_grpc
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:310
Enable gRPC used for negotiation in multiprocess tests
rtc_enable_libevent
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:260
rtc_enable_objc_symbol_export
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:58
Setting this to true will make RTC_OBJC_EXPORT expand to code that will
manage symbols visibility. By default, Obj-C/Obj-C++ symbols are exported
if C++ symbols are but setting this arg to true while keeping
rtc_enable_symbol_export=false will only export RTC_OBJC_EXPORT
annotated symbols.
rtc_enable_protobuf
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:241
Enables the use of protocol buffers for debug recordings.
rtc_enable_sctp
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:244
Set this to disable building with support for SCTP data channels.
rtc_enable_symbol_export
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:44
Setting this to true will make RTC_EXPORT (see rtc_base/system/rtc_export.h)
expand to code that will manage symbols visibility.
rtc_enable_win_wgc
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:226
When set to true, a capturer implementation that uses the
Windows.Graphics.Capture APIs will be available for use. This introduces a
dependency on the Win 10 SDK v10.0.17763.0.
rtc_exclude_audio_processing_module
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:120
Selects whether the audio processing module should be excluded.
rtc_exclude_field_trial_default
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:68
When WebRTC is built as part of Chromium it should exclude the default
implementation of field_trial unless it is building for NACL or
Chromecast.
rtc_exclude_metrics_default
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:77
Setting this to true will define WEBRTC_EXCLUDE_METRICS_DEFAULT which
will tell the pre-processor to remove the default definition of symbols
needed to use metrics. In that case a new implementation needs to be
provided.
rtc_exclude_system_time
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:83
Setting this to true will define WEBRTC_EXCLUDE_SYSTEM_TIME which
will tell the pre-processor to remove the default definition of the
SystemTimeNanos() which is defined in rtc_base/system_time.cc. In
that case a new implementation needs to be provided.
rtc_exclude_transient_suppressor
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:302
Set this to true to exclude the transient suppressor in the audio processing
module from the build.
rtc_include_builtin_audio_codecs
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:207
When set to false, builtin audio encoder/decoder factories and all the
audio codecs they depend on will not be included in libwebrtc.{a|lib}
(they will still be included in libjingle_peerconnection_so.so and
WebRTC.framework)
rtc_include_builtin_video_codecs
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:213
When set to false, builtin video encoder/decoder factories and all the
video codecs they depends on will not be included in libwebrtc.{a|lib}
(they will still be included in libjingle_peerconnection_so.so and
WebRTC.framework)
rtc_include_dav1d_in_internal_decoder_factory
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:229
Includes the dav1d decoder in the internal decoder factory when set to true.
rtc_include_ilbc
Current value = false
From //.gn:45
Overridden from the default = true
From //third_party/webrtc/webrtc.gni:91
Include the iLBC audio codec?
rtc_include_internal_audio_device
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:269
Chromium uses its own IO handling, so the internal ADM is only built for
standalone WebRTC.
rtc_include_opus
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:94
Disable this to avoid building the Opus audio codec.
rtc_include_pulse_audio
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:265
Excluded in Chromium since its prerequisites don't require Pulse Audio.
rtc_include_tests
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:281
Set this to true to build the unit tests.
Disabled when building with Chromium or Mozilla.
rtc_ios_macos_use_opengl_rendering
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:201
rtc_jsoncpp_root
Current value (from the default) = "//third_party/jsoncpp/source/include"
From //third_party/webrtc/webrtc.gni:105
Used to specify an external Jsoncpp include path when not compiling the
library that comes with WebRTC (i.e. rtc_build_json == 0).
rtc_libvpx_build_vp9
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:250
rtc_link_pipewire
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:141
Set this to link PipeWire and required libraries directly instead of using the dlopen.
rtc_opus_support_120ms_ptime
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:98
Enable this if the Opus version upon which WebRTC is built supports direct
encoding of 120 ms packets.
rtc_opus_variable_complexity
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:101
Enable this to let the Opus audio codec change complexity on the fly.
rtc_prefer_fixed_point
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:158
Selects fixed-point code where possible.
rtc_sanitize_coverage
Current value (from the default) = ""
From //third_party/webrtc/webrtc.gni:155
Set to "func", "block", "edge" for coverage generation.
At unit test runtime set UBSAN_OPTIONS="coverage=1".
It is recommend to set include_examples=0.
Use llvm's sancov -html-report for human readable reports.
See http://clang.llvm.org/docs/SanitizerCoverage.html .
rtc_ssl_root
Current value (from the default) = ""
From //third_party/webrtc/webrtc.gni:109
Used to specify an external OpenSSL include path when not compiling the
library that comes with WebRTC (i.e. rtc_build_ssl == 0).
rtc_use_absl_mutex
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:181
Enable this flag to make webrtc::Mutex be implemented by absl::Mutex.
rtc_use_dummy_audio_file_devices
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:185
By default, use normal platform audio support or dummy audio, but don't
use file-based audio playout and record.
rtc_use_h264
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:178
rtc_use_pipewire
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:138
Set this to use PipeWire on the Wayland display server.
By default it's only enabled on desktop Linux (excludes ChromeOS) and
only when using the sysroot as PipeWire is not available in older and
supported Ubuntu and Debian distributions.
rtc_use_x11
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:132
Set this to false to skip building code that requires X11.
rtc_use_x11_extensions
Current value (from the default) = true
From //third_party/webrtc/webrtc.gni:285
Set this to false to skip building code that also requires X11 extensions
such as Xdamage, Xfixes.
rtc_win_undef_unicode
Current value (from the default) = false
From //third_party/webrtc/webrtc.gni:221
When set to true and in a standalone build, it will undefine UNICODE and
_UNICODE (which are always defined globally by the Chromium Windows
toolchain).
This is only needed for testing purposes, WebRTC wants to be sure it
doesn't assume /DUNICODE and /D_UNICODE but that it explicitly uses
wide character functions.
runtime_call_stats_count_everything
Current value (from the default) = false
From //third_party/blink/renderer/platform/BUILD.gn:189
rust_sysroot_absolute
Current value (from the default) = ""
From //build/config/rust.gni:40
Chromium currently has a Rust toolchain for Android and Linux, but
if you wish to experiment on more platforms you can use this
argument to specify an alternative toolchain.
This should be an absolute path to a directory
containing a 'bin' directory and others. Commonly
<home dir>/.rustup/toolchains/nightly-<something>-<something>
rustc_can_link
Current value (from the default) = true
From //build/config/rust.gni:73
Rust code may end up being linked into a final executable by:
* rustc (which calls lld)
* our pre-existing C++ linker invocations
At the moment, this first pipeline is incompatible with the ldflags we use
for thin LTO, due to some problem in escaping gn rules. There's a further
problem with -lunwind on Android.
However, Rust code is still useful if it's contributing to our existing
C++ linker invocations, so this doesn't disable Rust entirely. It does
disable Rust unit test executables, so we do need to fix this.
https://crbug.com/1229423
NB this may be overridden by individual toolchains
rustc_version
Current value (from the default) = ""
From //build/config/rust.gni:32
The version string returned by rustc -V, if using an alternative toolchain.
safe_browsing_mode
Current value (from the default) = 1
From //components/safe_browsing/buildflags.gni:20
sample_profile_is_accurate
Current value (from the default) = false
From //build/config/compiler/compiler.gni:148
Whether we should consider the profile we're using to be accurate. Accurate
profiles have the benefit of (potentially substantial) binary size
reductions, by instructing the compiler to optimize cold and uncovered
functions heavily for size. This often comes at the cost of performance.
sanitizer_coverage_flags
Current value (from the default) = ""
From //build/config/sanitizers/sanitizers.gni:100
Value for -fsanitize-coverage flag. Setting this causes
use_sanitizer_coverage to be enabled.
This flag is not used for libFuzzer (use_libfuzzer=true). Instead, we use:
-fsanitize=fuzzer-no-link
Default value when unset and use_fuzzing_engine=true:
trace-pc-guard
Default value when unset and use_sanitizer_coverage=true:
trace-pc-guard,indirect-calls
seed_corpus_dir
Current value (from the default) = "//out/Default/gen/components/viz/service/compositor_frame_fuzzer/binary_seed_corpus"
From //components/viz/service/compositor_frame_fuzzer/BUILD.gn:9
show_includes
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:177
Enable -H, which prints the include tree during compilation.
For use by tools/clang/scripts/analyze_includes.py
skia_enable_skshaper
Current value (from the default) = true
From //third_party/skia/modules/skshaper/skshaper.gni:20
skia_use_dawn
Current value (from the default) = false
From //skia/features.gni:7
Enable experimental SkiaRenderer Dawn backend.
skia_use_gl
Current value (from the default) = true
From //skia/features.gni:8
skip_buildtools_check
Current value (from the default) = false
From //third_party/perfetto/gn/perfetto.gni:314
Skip buildtools dependency checks (needed for ChromeOS).
strip_debug_info
Current value (from the default) = false
From //build/config/compiler/compiler.gni:64
Android-only: Strip the debug info of libraries within lib.unstripped to
reduce size. As long as symbol_level > 0, this will still allow stacks to be
symbolized.
subpixel_font_rendering_disabled
Current value (from the default) = false
From //gpu/ipc/service/BUILD.gn:13
supports_llvm
Current value (from the default) = true
From //third_party/swiftshader/src/Reactor/reactor.gni:17
supports_subzero
Current value (from the default) = true
From //third_party/swiftshader/src/Reactor/reactor.gni:13
Subzero doesn't support ARM64, MIPS64, PPC64, and RISCV64 (only x86 and ARMv7a).
swiftshader_optimized_debug_build
Current value (from the default) = true
From //third_party/swiftshader/src/swiftshader.gni:23
By default, build SwiftShader with optimizations enabled in debug
for performance reasons. Set to false to build as unoptimized.
swiftshader_startup_dialog
Current value (from the default) = false
From //third_party/swiftshader/src/swiftshader.gni:27
If enabled, debug builds on Windows will pop up a dialog when the
SwiftShader DLL gets loaded, to facilitate attaching a debugger.
symbol_level
Current value (from the default) = -1
From //build/config/compiler/compiler.gni:59
How many symbols to include in the build. This affects the performance of
the build since the symbols are large and dealing with them is slow.
2 means regular build with symbols.
1 means minimal symbols, usually enough for backtraces only. Symbols with
internal linkage (static functions or those in anonymous namespaces) may not
appear when using this level.
0 means no symbols.
-1 means auto-set according to debug/release and platform.
sync_user_agent_product
Current value (from the default) = "Chrome"
From //components/sync/base/BUILD.gn:10
Controls the product part of the user agent calculated in sync_util.cc.
sysroot
Current value (from the default) = ""
From //build/config/sysroot.gni:20
The path of the sysroot for the current toolchain. If empty, default
sysroot is used.
system_headers_in_deps
Current value (from the default) = false
From //build/toolchain/gcc_toolchain.gni:34
Use -MD instead of -MMD for compiler commands. This is useful for tracking
the comprehensive set of dependencies.
system_libdir
Current value (from the default) = "lib"
From //build/config/linux/pkg_config.gni:47
CrOS systemroots place pkgconfig files at <systemroot>/usr/share/pkgconfig
and one of <systemroot>/usr/lib/pkgconfig or <systemroot>/usr/lib64/pkgconfig
depending on whether the systemroot is for a 32 or 64 bit architecture.
When build under GYP, CrOS board builds specify the 'system_libdir' variable
as part of the GYP_DEFINES provided by the CrOS emerge build or simple
chrome build scheme. This variable permits controlling this for GN builds
in similar fashion by setting the `system_libdir` variable in the build's
args.gn file to 'lib' or 'lib64' as appropriate for the target architecture.
system_wayland_scanner_path
Current value (from the default) = "/usr/bin/wayland-scanner"
From //third_party/wayland/features.gni:17
target_cpu
Current value (from the default) = ""
(Internally set; try `gn help target_cpu`.)
target_environment
Current value (from the default) = ""
From //build/config/ios/config.gni:11
Configure the environment for which to build. Could be either "device",
"simulator" or "catalyst". If unspecified, then it will be assumed to be
"simulator" if the target_cpu is "x68" or "x64", "device" otherwise. The
default is only there for compatibility reasons and will be removed (see
crbug.com/1138425 for more details).
target_os
Current value (from the default) = ""
(Internally set; try `gn help target_os`.)
target_rpath
Current value (from the default) = ""
From //build/config/chromecast_build.gni:30
If non empty, rpath of executables is set to this.
If empty, default value is used.
target_sysroot
Current value (from the default) = ""
From //build/config/sysroot.gni:13
The path of the sysroot that is applied when compiling using the target
toolchain.
target_sysroot_dir
Current value (from the default) = "//build/linux"
From //build/config/sysroot.gni:16
The path to directory containing linux sysroot images.
tests_have_location_tags
Current value (from the default) = true
From //testing/test.gni:23
Some component repos (e.g. ANGLE) import //testing but do not have
"location_tags.json", and so we don't want to try and upload the tags
for their tests.
And, some build configs may simply turn off generation altogether.
thin_lto_enable_optimizations
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:129
tint_build_glsl_writer
Current value (from the default) = true
From //third_party/dawn/tint_overrides_with_defaults.gni:72
tint_build_hlsl_writer
Current value (from the default) = true
From //third_party/dawn/tint_overrides_with_defaults.gni:67
tint_build_msl_writer
Current value (from the default) = true
From //third_party/dawn/tint_overrides_with_defaults.gni:62
tint_build_unittests
Current value (from the default) = true
From //third_party/dawn/tint_overrides_with_defaults.gni:77
toolkit_views
Current value (from the default) = true
From //build/config/ui.gni:33
True means the UI is built using the "views" framework.
treat_warnings_as_errors
Current value (from the default) = true
From //build/config/compiler/compiler.gni:49
Default to warnings as errors for default workflow, where we catch
warnings with known toolchains. Allow overriding this e.g. for Chromium
builds on Linux that could use a different version of the compiler.
With GCC, warnings in no-Chromium code are always not treated as errors.
trial_comparison_cert_verifier_supported
Current value (from the default) = false
From //net/features.gni:40
Platforms where the cert verifier comparison trial is supported.
See https://crbug.com/649026.
use_afl
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:75
Compile for fuzzing with AFL.
use_allocator
Current value (from the default) = "partition"
From //base/allocator/allocator.gni:48
Memory allocator to use. Set to "none" to use default allocator.
use_allocator_shim
Current value (from the default) = true
From //base/allocator/allocator.gni:51
Causes all the allocations to be routed via allocator_shim.cc.
use_alsa
Current value (from the default) = true
From //media/media_options.gni:169
use_amdgpu_minigbm
Current value (from the default) = false
From //third_party/minigbm/BUILD.gn:17
use_android_unwinder_v2
Current value (from the default) = true
From //build/config/compiler/compiler.gni:33
Set to true to use the android unwinder V2 implementation.
use_android_user_agent
Current value (from the default) = false
From //chromecast/chromecast.gni:87
Include 'Android' in user agent string to avoid being served desktop
versions of websites.
TODO(halliwell): consider making this default for all Cast hardware.
use_arc_protected_media
Current value (from the default) = false
From //media/gpu/args.gni:43
Indicates if the ChromeOS protected media functionality should also be
utilized by HW video decoding for ARC.
use_asan_backup_ref_ptr
Current value (from the default) = false
From //base/allocator/allocator.gni:119
The supported platforms are supposed to match `_is_brp_supported`, but we
enable the feature on Linux early because it's most widely used for security
research
use_aura
Current value (from the default) = true
From //build/config/ui.gni:28
Indicates if Aura is enabled. Aura is a low-level windowing library, sort
of a replacement for GDI or GTK.
use_backup_ref_ptr
Current value (from the default) = true
From //base/allocator/allocator.gni:90
Set use_backup_ref_ptr true to use BackupRefPtr (BRP) as the implementation
of raw_ptr<T>, and enable PartitionAlloc support for it.
use_base_test_suite
Current value (from the default) = true
From //sandbox/linux/BUILD.gn:20
On Android, use plain GTest.
use_blink_extensions_chromeos
Current value (from the default) = false
From //third_party/blink/renderer/config.gni:49
If true, the experimental renderer extensions library will be used.
use_bluez
Current value (from the default) = true
From //device/bluetooth/cast_bluetooth.gni:5
use_bundled_fontconfig
Current value (from the default) = true
From //third_party/fontconfig/fontconfig.gni:11
use_bundled_weston
Current value (from the default) = false
From //ui/ozone/platform/wayland/wayland.gni:14
Checks if Weston must be compiled
use_cfi_cast
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:115
Enable checks for bad casts: derived cast and unrelated cast.
TODO(krasin): remove this, when we're ready to add these checks by default.
https://crbug.com/626794
use_cfi_diag
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:64
Print detailed diagnostics when Control Flow Integrity detects a violation.
use_cfi_icall
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:61
use_cfi_recover
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:68
Let Control Flow Integrity continue execution instead of crashing when
printing diagnostics (use_cfi_diag = true).
use_chromecast_cdms
Current value (from the default) = true
From //chromecast/chromecast.gni:198
use_chromeos_protected_av1
Current value (from the default) = false
From //media/gpu/args.gni:48
Indicates if ChromeOS protected media supports the AV1 codec. By default
H.264, VP9 and HEVC are enabled if protected media is enabled; AV1 is
optional.
use_chromeos_protected_media
Current value (from the default) = false
From //media/gpu/args.gni:39
Indicates if ChromeOS protected media support exists. This is used
to enable the CDM daemon in Chrome OS as well as support for
encrypted content with HW video decoders.
TODO(jkardatzke): Enable this for Lacros always, it is determined at runtime
in that configuration.
use_chromium_rust_toolchain
Current value (from the default) = true
From //build/config/rust.gni:29
Use experimental Rust toolchain built in-tree. See //tools/rust. For now,
only use it for linux targets. The package only has prebuilt libs for linux.
More targets will be added later.
Ideally this should check `current_os` so that e.g. Android builds will use
the Android toolchain for target artifacts and the Chromium Rust toolchain
for host artifacts. Currently there is an std mixup in //build/rust/std that
prevents this.
TODO(https://crbug.com/1245714): fix std handling and check `current_os`.
use_clang_coverage
Current value (from the default) = false
From //build/config/coverage/coverage.gni:23
use_clang_profiling
Current value (from the default) = false
From //build/config/profiling/profiling.gni:10
use_clang_profiling_inside_sandbox
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:180
use_command_buffer
Current value (from the default) = false
From //device/vr/buildflags/buildflags.gni:14
use_cras
Current value (from the default) = false
From //media/media_options.gni:48
Override to dynamically link the cras (ChromeOS audio) library.
use_crash_key_stubs
Current value (from the default) = false
From //components/crash/core/common/BUILD.gn:11
If set to true, this will stub out and disable the entire crash key system.
use_cups
Current value (from the default) = true
From //printing/buildflags/buildflags.gni:27
use_cups_ipp
Current value (from the default) = false
From //printing/buildflags/buildflags.gni:51
Enables the CUPS IPP printing backend.
TODO(crbug.com/226176): Remove this after CUPS PPD API calls are removed.
use_custom_libcxx
Current value (from the default) = true
From //build/config/c++/c++.gni:15
use_custom_libcxx_for_host
Current value (from the default) = false
From //build/config/c++/c++.gni:25
Use libc++ instead of stdlibc++ when using the host_cpu toolchain, even if
use_custom_libcxx is false. This is useful for cross-compiles where a custom
toolchain for the target_cpu has been set as the default toolchain, but
use_custom_libcxx should still be true when building for the host. The
expected usage is to set use_custom_libcxx=false and
use_custom_libcxx_for_host=true in the passed in buildargs.
use_cxx11
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:89
Allow projects that wish to stay on C++11 to override Chromium's default.
use_dawn
Current value (from the default) = true
From //ui/gl/features.gni:21
Should Dawn support be compiled to back the WebGPU implementation?
Also controls linking Dawn dependencies in such as SPIRV-Tools/SPIRV-Cross.
use_dbus
Current value (from the default) = true
From //build/config/features.gni:36
use_debug_fission
Current value (from the default) = "default"
From //build/config/compiler/compiler.gni:80
use_debug_fission: whether to use split DWARF debug info
files. This can reduce link time significantly, but is incompatible
with some utilities such as icecc and ccache. Requires gold and
gcc >= 4.8 or clang.
http://gcc.gnu.org/wiki/DebugFission
This is a placeholder value indicating that the code below should set
the default. This is necessary to delay the evaluation of the default
value expression until after its input values such as use_gold have
been set, e.g. by a toolchain_args() block.
use_dummy_lastchange
Current value (from the default) = false
From //build/util/lastchange.gni:9
use_dwarf5
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:165
Enable DWARF v5.
use_egl
Current value (from the default) = true
From //ui/gl/features.gni:17
use_evdev_gestures
Current value (from the default) = false
From //ui/events/ozone/evdev/BUILD.gn:15
Support ChromeOS touchpad gestures with ozone.
use_external_fuzzing_engine
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:78
Compile for fuzzing with an external engine (e.g., Grammarinator).
use_external_popup_menu
Current value (from the default) = false
From //content/common/features.gni:9
Whether or not to use external popup menu.
use_exynos_minigbm
Current value (from the default) = false
From //third_party/minigbm/BUILD.gn:18
use_fake_binary_experiment
Current value (from the default) = false
From //base/allocator/allocator.gni:114
Registers the binary for a fake binary A/B experiment. The binaries built
with this flag have no behavior difference, except for setting a synthetic
Finch.
use_full_pdb_paths
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:173
Override this to put full paths to PDBs in Windows PE files. This helps
windbg and Windows Performance Analyzer with finding the PDBs in some local-
build scenarios. This is never needed for bots or official builds. Because
this puts the output directory in the DLLs/EXEs it breaks build determinism.
Bugs have been reported to the windbg/WPA teams and this workaround will be
removed when they are fixed.
use_gcm_from_platform
Current value (from the default) = false
From //components/gcm_driver/config.gni:8
Use native GCM driver for all non-Android builds. On Android, the platform
includes GMS which provides the GCM client.
use_ghash
Current value (from the default) = true
From //build/config/compiler/BUILD.gn:119
Turn this on to use ghash feature of lld for faster debug link on Windows.
http://blog.llvm.org/2018/01/improving-link-time-on-windows-with.html
use_gio
Current value (from the default) = true
From //build/config/features.gni:38
use_glib
Current value (from the default) = true
From //build/config/ui.gni:36
use_gnome_keyring
Current value (from the default) = true
From //components/os_crypt/features.gni:11
Whether to use libgnome-keyring (deprecated by libsecret).
See http://crbug.com/466975 and http://crbug.com/355223.
use_gold
Current value (from the default) = false
From //build/config/compiler/compiler.gni:222
Whether to use the gold linker from binutils instead of lld or bfd.
use_goma
Current value (from the default) = false
From //build/toolchain/goma.gni:9
Set to true to enable distributed compilation using Goma.
use_goma_rust
Current value (from the default) = false
From //build/config/rust.gni:60
Use goma for Rust builds. Experimental. The only known problem is
b/193072381, but then again, we don't expect a build speedup before much
more work is done.
use_goma_thin_lto
Current value (from the default) = false
From //build/config/compiler/compiler.gni:98
If true, use Goma for ThinLTO code generation where applicable.
use_gtk
Current value (from the default) = true
From //build/config/linux/gtk/gtk.gni:9
Whether or not we should use libgtk.
use_icf
Current value (from the default) = true
From //build/config/compiler/BUILD.gn:190
Set to true to use icf, Identical Code Folding.
icf=all is broken in older golds, see
https://sourceware.org/bugzilla/show_bug.cgi?id=17704
chromeos binutils has been patched with the fix, so always use icf there.
The bug only affects x86 and x64, so we can still use ICF when targeting
other architectures.
lld doesn't have the bug.
use_intel_minigbm
Current value (from the default) = false
From //third_party/minigbm/BUILD.gn:19
use_internal_autofill_patterns
Current value (from the default) = false
From //components/autofill/core/browser/BUILD.gn:30
Normally, only branded builds use Google-internal sets of parsing patterns.
Setting the variable 'use_internal_autofill_patterns' in args.gn overrides
this default.
use_internal_isolated_origins
Current value (from the default) = false
From //components/site_isolation/BUILD.gn:18
Normally, only Google Chrome Android and Fuchsia WebEngine builds will use
a Google-internal list of isolated origins defined below.
If other Fuchsia embedders are added, the associated logic may need to be
updated. See crbug.com/1179087.
You can set the variable 'use_internal_isolated_origins' to true to use this
Google-internal list of isolated origins even in a developer build. Setting
this variable explicitly to true will cause your build to fail if the
internal file is missing.
use_jacoco_coverage
Current value (from the default) = false
From //build/config/coverage/coverage.gni:27
Enables JaCoCo Java code coverage.
use_java_goma
Current value (from the default) = false
From //build/toolchain/goma.gni:26
TODO(crbug.com/726475): true if use_goma = true in the future.
use_kerberos
Current value (from the default) = true
From //net/features.gni:19
Enable Kerberos authentication. It is disabled by default on iOS, Fuchsia
and Chromecast, at least for now. This feature needs configuration
(krb5.conf and so on).
TODO(fuchsia): Enable kerberos on Fuchsia when it's implemented there.
use_layout_plugin
Current value (from the default) = true
From //third_party/blink/renderer/core/BUILD.gn:89
Set to true to enable the clang layout plugin that help you to follow the
layout-related restrictions during compilation.
use_libfuzzer
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:72
Compile for fuzzing with LLVM LibFuzzer.
See http://www.chromium.org/developers/testing/libfuzzer
use_libgav1_parser
Current value (from the default) = true
From //third_party/libgav1/options.gni:14
use_libinput
Current value (from the default) = false
From //build/config/chromeos/args.gni:37
Determines if we're willing to link against libinput
use_libjpeg_turbo
Current value (from the default) = true
From //third_party/libjpeg.gni:11
Uses libjpeg_turbo as the jpeg implementation. Has no effect if
use_system_libjpeg is set.
use_libpci
Current value (from the default) = true
From //third_party/angle/BUILD.gn:31
Use the PCI lib to collect GPU information on Linux.
use_lld
Current value (from the default) = true
From //build/config/compiler/compiler.gni:41
Set to true to use lld, the LLVM linker.
In late bring-up on macOS (see docs/mac_lld.md).
Tentatively used on iOS.
The default linker everywhere else.
use_locally_built_instrumented_libraries
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:47
Use dynamic libraries instrumented by one of the sanitizers instead of the
standard system libraries. Set this flag to build the libraries from source.
use_low_quality_image_interpolation
Current value (from the default) = false
From //third_party/blink/renderer/config.gni:43
If true, defaults image interpolation to low quality.
use_lto_in_rustc_linking
Current value (from the default) = false
From //build/config/rust.gni:55
Use LTO when using rustc to link binaries. Experimental. Currently incompatible
with the options we use in our C++ toolchain to split LTO units.
This has no effect on the production of normal Chrome binaries, which are
linked by clang/lld rather than rustc.
https://crbug.com/1229419
use_marvell_minigbm
Current value (from the default) = false
From //third_party/minigbm/BUILD.gn:20
use_mediatek_minigbm
Current value (from the default) = false
From //third_party/minigbm/BUILD.gn:21
use_meson_minigbm
Current value (from the default) = false
From //third_party/minigbm/BUILD.gn:22
use_message_port_core
Current value (from the default) = false
From //components/cast/message_port/BUILD.gn:13
If true, forces cast_api_bindings::CreatePlatformMessagePortPair to use
cast_message_port::CreateMessagePortPair as its implementation. Otherwise,
uses one of the other types based on platform.
use_mpris
Current value (from the default) = true
From //components/system_media_controls/linux/buildflags/buildflags.gni:11
Enables Chromium implementation of the MPRIS D-Bus interface for controlling
media playback. See ../README.md for details.
use_msm_minigbm
Current value (from the default) = false
From //third_party/minigbm/BUILD.gn:23
use_mte_checked_ptr
Current value (from the default) = false
From //base/allocator/allocator.gni:92
use_nss_certs
Current value (from the default) = true
From //crypto/features.gni:9
True if NSS is used for certificate handling.
use_official_enterprise_connectors_api_keys
Current value (from the default) = false
From //chrome/browser/BUILD.gn:66
You can set the variable 'use_official_enterprise_connectors_api_keys' to
true to use the Google-internal file containing official API keys
for enterprise connector partners even in a developer build. Setting this
variable explicitly to true will cause your build to fail if the
internal file is missing.
Note that official builds always behave as if the variable
was explicitly set to true, i.e. they always use official keys,
and will fail to build if the internal file is missing.
use_official_google_api_keys
Current value (from the default) = ""
From //google_apis/BUILD.gn:28
Set the variable 'use_official_google_api_keys' to true
to use the Google-internal file containing official API keys
even in a developer build. Setting this variable explicitly to
true will cause the build to fail if the internal file is missing.
Set the variable to false to not use the internal file, even for
Chrome-branded builds or when it exists in your checkout.
Leave it unset or set to "" to have the variable
implicitly set to true if you have
src/google_apis/internal/google_chrome_api_keys.h in your
checkout, and implicitly set to false if not.
Note that Chrome-branded builds always behave as if the variable
was explicitly set to true, i.e. they always use official keys,
and will fail to build if the internal file is missing.
use_ozone
Current value (from the default) = true
From //build/config/ozone.gni:12
Indicates if Ozone is enabled. Ozone is a low-level library layer for Linux
that does not require X11.
use_pangocairo
Current value (from the default) = true
From //build/config/linux/pangocairo/pangocairo.gni:9
use_partition_alloc
Current value (from the default) = true
From //base/allocator/allocator.gni:61
Whether PartitionAlloc should be available for use or not.
true makes PartitionAlloc linked to the executable or shared library and
makes it available for use. It doesn't mean that the default allocator
is PartitionAlloc, which is governed by |use_allocator|.
This flag is currently set to false only on Cronet bots, because Cronet
doesn't use PartitionAlloc at all, and doesn't wish to incur the library
size increase (crbug.com/674570).
use_perfetto_client_library
Current value (from the default) = false
From //build_overrides/build.gni:28
Switches the TRACE_EVENT instrumentation from base's TraceLog implementation
to //third_party/perfetto's client library. Not implemented yet, currently a
no-op to set up trybot infrastructure.
TODO(crbug/1006769): Switch to perfetto's client library.
use_platform_icu_alternatives
Current value (from the default) = false
From //url/features.gni:10
Enables the use of ICU alternatives in lieu of ICU for the target toolchain.
The flag is used for Cronet to reduce the size of the Cronet binary.
use_pulseaudio
Current value (from the default) = true
From //media/media_options.gni:180
use_qt
Current value (from the default) = false
From //ui/qt/qt.gni:7
https://crbug.com/1317782 enable QT UI by default on Linux.
use_radeon_minigbm
Current value (from the default) = false
From //third_party/minigbm/BUILD.gn:24
use_real_dbus_clients
Current value (from the default) = false
From //chromeos/dbus/config/use_real_dbus_clients.gni:9
Instantiate real D-Bus clients instead of fakes.
use_remoteexec
Current value (from the default) = false
From //build/toolchain/rbe.gni:14
Set to true to enable remote compilation using reclient.
use_rockchip_minigbm
Current value (from the default) = false
From //third_party/minigbm/BUILD.gn:25
use_rts
Current value (from the default) = false
From //build/config/rts.gni:4
For more info about RTS, please see
//docs/testing/regression-test-selection.md
use_rtti
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:80
Build with C++ RTTI enabled. Chromium builds without RTTI by default,
but some sanitizers are known to require it, like CFI diagnostics
and UBsan variants.
use_runtime_vlog
Current value (from the default) = true
From //build/config/logging.gni:31
Use runtime vlog everywhere except for ash-chrome.
When `use_runtime_vlog` is true,
command line switch `--vmodule=xxx` or `--v=x` could be used to
control vlog level at runtime.
when `use_runtime_volog` is false,
verbose log level is controlled by `ENABLE_VLOG_LEVEL` macro. VLOG(n)
is kept and generate output if `n` is less than or equal to the vlog
level defined by the macro.
Command line switch `--vmodule=xxx`, or `--v=x` would have no effect.
Runtime vlog is used everywhere except on ash-chrome.
Ash-chrome has a few vmodule patterns that need to be used indefinitely
to investigate problems from logs in feedback reports. These vmodule
patterns are using too much cpu cycles (see http://crbug/489441). Turning
off runtime vlog and using build time vlog would avoid paying that cpu tax
and have a nice side effect of a smaller production binary.
use_sanitizer_configs_without_instrumentation
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:105
When enabled, only relevant sanitizer defines are set, but compilation
happens with no extra flags. This is useful when in component build
enabling sanitizers only in some of the components.
use_sanitizer_coverage
Current value (from the default) = false
From //build/config/sanitizers/sanitizers.gni:169
use_static_angle
Current value (from the default) = false
From //ui/gl/features.gni:12
Should ANGLE be linked statically?
use_swiftshader_with_subzero
Current value (from the default) = true
From //third_party/swiftshader/src/Reactor/reactor.gni:27
Subzero produces much smaller binaries, so always use it when available,
except for MSan builds which only get Reactor code instrumented with LLVM.
use_synaptics_minigbm
Current value (from the default) = false
From //third_party/minigbm/BUILD.gn:26
use_sysroot
Current value (from the default) = true
From //build/config/sysroot.gni:24
Controls default is_linux sysroot. If set to true, and sysroot
is empty, default sysroot is calculated.
use_system_crash_handler
Current value (from the default) = false
From //chromecast/chromecast.gni:134
Set to true to forward crashes to the system's crash handler instead of
handling them internally. This disables the built-in crash handler.
use_system_freetype
Current value (from the default) = false
From //build/config/freetype/freetype.gni:13
Blink needs a recent and properly build-configured FreeType version to
support OpenType variations, color emoji and avoid security bugs. By default
we ship and link such a version as part of Chrome. For distributions that
prefer to keep linking to the version the system, FreeType must be newer
than version 2.7.1 and have color bitmap support compiled in. WARNING:
System FreeType configurations other than as described WILL INTRODUCE TEXT
RENDERING AND SECURITY REGRESSIONS.
use_system_harfbuzz
Current value (from the default) = false
From //third_party/harfbuzz-ng/harfbuzz.gni:11
Blink uses a cutting-edge version of Harfbuzz; most Linux distros do not
contain a new enough version of the code to work correctly. However,
ChromeOS chroots (i.e, real ChromeOS builds for devices) do contain a
new enough version of the library, and so this variable exists so that
ChromeOS can build against the system lib and keep binary sizes smaller.
use_system_lcms2
Current value (from the default) = false
From //third_party/pdfium/pdfium.gni:60
Don't build against bundled lcms2.
use_system_libdrm
Current value (from the default) = true
From //build/config/linux/libdrm/BUILD.gn:14
Controls whether the build should use the version of libdrm library shipped
with the system. In release builds of desktop Linux and Chrome OS we use the
system version. Some Chromecast devices use this as well.
use_system_libjpeg
Current value (from the default) = false
From //third_party/libjpeg.gni:7
Uses system libjpeg. If true, overrides use_libjpeg_turbo.
use_system_libopenjpeg2
Current value (from the default) = false
From //third_party/pdfium/pdfium.gni:63
Don't build against bundled libopenjpeg2.
use_system_libpng
Current value (from the default) = false
From //third_party/pdfium/pdfium.gni:66
Don't build against bundled libpng.
use_system_libsync
Current value (from the default) = false
From //third_party/libsync/BUILD.gn:13
Controls whether the build should use the version of libsync
library shipped with the system. In release builds of Chrome OS we
use the system version, but when building on dev workstations we
bundle it because Ubuntu doesn't ship a usable version.
use_system_libwayland
Current value (from the default) = true
From //third_party/wayland/features.gni:12
Controls whether the build should use the version of Wayland
library shipped with the system or Chromium third_party.
use_system_minigbm
Current value (from the default) = true
From //third_party/minigbm/BUILD.gn:15
Controls whether the build should use the version of minigbm library shipped
with the system. In release builds of desktop Linux and Chrome OS we use the
system version.
use_system_wayland_scanner
Current value (from the default) = false
From //third_party/wayland/features.gni:21
This may be set by Chromium packagers who do not wish to use the bundled
wayland scanner.
use_system_zlib
Current value (from the default) = false
From //third_party/pdfium/pdfium.gni:57
Don't build against bundled zlib.
use_tegra_minigbm
Current value (from the default) = false
From //third_party/minigbm/BUILD.gn:27
use_text_section_splitting
Current value (from the default) = false
From //build/config/compiler/BUILD.gn:149
This argument is to control whether enabling text section splitting in the
final binary. When enabled, the separated text sections with prefix
'.text.hot', '.text.unlikely', '.text.startup' and '.text.exit' will not be
merged to '.text' section. This allows us to identify the hot code section
('.text.hot') in the binary which may be mlocked or mapped to huge page to
reduce TLB misses which gives performance improvement on cpu usage.
The gold linker by default has text section splitting enabled.
use_thin_lto
Current value (from the default) = false
From //build/config/compiler/compiler.gni:91
use_udev
Current value (from the default) = true
From //build/config/features.gni:34
libudev usage. This currently only affects the content layer.
use_unix_sockets
Current value (from the default) = true
From //chromecast/chromecast.gni:121
Whether use unix sockets in Cast input/output stream.
use_unofficial_version_number
Current value (from the default) = true
From //components/version_info/BUILD.gn:10
use_v4l2_codec
Current value (from the default) = false
From //media/gpu/args.gni:21
Indicates if Video4Linux2 codec is used. This is used for all CrOS
platforms which have v4l2 hardware encoder / decoder.
use_v4l2_codec_aml
Current value (from the default) = false
From //media/gpu/args.gni:25
Indicates if Video4Linux2 AML encoder is used. This is used for AML
platforms which have v4l2 hardware encoder
use_v4lplugin
Current value (from the default) = false
From //media/gpu/args.gni:17
Indicates if V4L plugin is used.
use_v8_context_snapshot
Current value (from the default) = true
From //tools/v8_context_snapshot/v8_context_snapshot.gni:19
use_vaapi
Current value (from the default) = true
From //media/gpu/args.gni:31
Indicates if VA-API-based hardware acceleration is to be used. This
is typically the case on x86-based ChromeOS devices.
VA-API should also be compiled by default on x11-using linux devices
using x86/x64.
use_vaapi_image_codecs
Current value (from the default) = false
From //media/gpu/args.gni:68
VA-API also allows decoding of images, but we don't want to use this
outside of chromeos, even if video decoding is enabled.
use_vaapi_x11
Current value (from the default) = true
From //media/gpu/args.gni:11
Indicates if X11 VA-API-based hardware acceleration is to be used.
See also the comment near the |use_vaapi| arg.
use_vc4_minigbm
Current value (from the default) = false
From //third_party/minigbm/BUILD.gn:28
use_vendor_shlibs
Current value (from the default) = true
From //chromecast/chromecast.gni:152
link vendor-supplied functionality as shared libraries. When true,
cast_shared_library targets are normal shared libraries. When false,
they become source_sets.
use_viz_debugger
Current value (from the default) = true
From //components/viz/common/debugger/viz_debugger.gni:8
Indicates if the Viz Debugger is enabled. This is disabled by default on
official builds due to security and performance reasons.
use_vr_assets_component
Current value (from the default) = false
From //chrome/browser/vr/features.gni:12
Whether to register, download, etc. the VR assets component.
use_wayland_gbm
Current value (from the default) = true
From //ui/ozone/platform/wayland/wayland.gni:11
Checks if Wayland must be compiled with dmabuf/gbm feature, which allows a
multi-process hardware accelerated mode.
use_webaudio_ffmpeg
Current value (from the default) = false
From //third_party/blink/renderer/config.gni:46
If true, ffmpeg will be used for computing FFTs for WebAudio
use_webaudio_pffft
Current value (from the default) = true
From //third_party/blink/renderer/config.gni:20
If true, use PFFFT for WebAudio FFT support. Do not use for Mac because the
FFT library there is much faster.
use_wuffs_gif_parser
Current value (from the default) = true
From //third_party/wuffs/config.gni:6
use_xkbcommon
Current value (from the default) = true
From //ui/base/ui_features.gni:10
using_mismatched_sample_profile
Current value (from the default) = false
From //build/config/compiler/compiler.gni:105
Whether we're using a sample profile collected on an architecture different
than the one we're compiling for.
It's currently not possible to collect AFDO profiles on anything but
x86{,_64}.
v8_advanced_bigint_algorithms
Current value (from the default) = true
From //v8/gni/v8.gni:105
Enable advanced BigInt algorithms, costing about 10-30 KB binary size
depending on platform. Disabled on Android to save binary size.
v8_allocation_site_tracking
Current value (from the default) = true
From //v8/BUILD.gn:355
Enable global allocation site tracking.
v8_android_log_stdout
Current value (from the default) = false
From //v8/BUILD.gn:31
Print to stdout on Android.
v8_annotate_torque_ir
Current value (from the default) = false
From //v8/BUILD.gn:277
Generate comments describing the Torque intermediate representation.
v8_builtins_profiling_log_file
Current value (from the default) = ""
From //v8/BUILD.gn:190
Provides the given V8 log file as an input to mksnapshot, where it can be
used for profile-guided optimization of builtins.
To do profile-guided optimizations of builtins:
1. Build with v8_enable_builtins_profiling = true
2. Run your chosen workload with the --turbo-profiling-log-builtins flag.
For Chrome, the invocation might look like this:
chrome --no-sandbox --disable-extensions
--js-flags="--turbo-profiling-log-builtins --logfile=path/to/v8.log"
"http://localhost/test-suite"
3. Run tools/get_hints.py to produce the branch hints, selecting min_count
and threshold_ratio as you wish.
4. Optionally repeat steps 2-3 for additional workloads, and use
tools/combine_hints.py to combine the hints produced in step 3 into a
single file.
5. Build again with v8_builtins_profiling_log_file set to the file created
in step 3 or 4.
v8_can_use_fpu_instructions
Current value (from the default) = true
From //v8/BUILD.gn:223
Similar to vfp but on MIPS.
v8_check_header_includes
Current value (from the default) = false
From //v8/BUILD.gn:238
Check that each header can be included in isolation (requires also
setting the "check_v8_header_includes" gclient variable to run a
specific hook).
v8_code_comments
Current value (from the default) = ""
From //v8/BUILD.gn:107
Allow runtime-enabled code comments (with --code-comments). Enabled by
default in debug builds.
Sets -dV8_CODE_COMMENTS
v8_code_coverage
Current value (from the default) = false
From //v8/gni/v8.gni:14
Set flags for tracking code coverage. Uses gcov with gcc and sanitizer
coverage with clang.
v8_context_snapshot_filename
Current value (from the default) = "v8_context_snapshot.bin"
From //tools/v8_context_snapshot/v8_context_snapshot.gni:44
v8_control_flow_integrity
Current value (from the default) = false
From //v8/BUILD.gn:286
Enable control-flow integrity features, such as pointer authentication for
ARM64.
v8_correctness_fuzzer
Current value (from the default) = false
From //v8/gni/v8.gni:17
Includes files needed for correctness fuzzing.
v8_current_cpu
Current value (from the default) = "x64"
From //build/config/v8_target_cpu.gni:60
This argument is declared here so that it can be overridden in toolchains.
It should never be explicitly set by the user.
v8_custom_deps
Current value (from the default) = ""
From //v8/BUILD.gn:34
Dynamically set an additional dependency from v8/custom_deps.
v8_deprecation_warnings
Current value (from the default) = true
From //v8/BUILD.gn:56
Enable compiler warnings when using V8_DEPRECATED apis.
v8_dict_property_const_tracking
Current value (from the default) = false
From //v8/BUILD.gn:339
Experimental feature for tracking constness of properties in non-global
dictionaries. Enabling this also always keeps prototypes in dict mode,
meaning that they are not switched to fast mode.
Sets -DV8_DICT_PROPERTY_CONST_TRACKING
v8_disable_write_barriers
Current value (from the default) = false
From //v8/BUILD.gn:258
Disable write barriers when GCs are non-incremental and
heap has single generation.
v8_embed_script
Current value (from the default) = ""
From //v8/BUILD.gn:62
Embeds the given script into the snapshot.
v8_embedder_string
Current value (from the default) = ""
From //v8/BUILD.gn:65
Allows the embedder to add a custom suffix to the version string.
v8_enable_31bit_smis_on_64bit_arch
Current value (from the default) = false
From //v8/BUILD.gn:126
v8_enable_allocation_folding
Current value (from the default) = true
From //v8/BUILD.gn:349
Enable allocation folding globally (sets -dV8_ALLOCATION_FOLDING).
When it's disabled, the --turbo-allocation-folding runtime flag will be ignored.
v8_enable_atomic_object_field_writes
Current value (from the default) = ""
From //v8/BUILD.gn:147
Sets -dV8_ATOMIC_OBJECT_FIELD_WRITES and turns all field write operations
into relaxed atomic operations.
v8_enable_backtrace
Current value (from the default) = ""
From //v8/gni/v8.gni:33
Support for backtrace_symbols on linux.
v8_enable_builtins_profiling
Current value (from the default) = false
From //v8/BUILD.gn:165
Runs mksnapshot with --turbo-profiling. After building in this
configuration, any subsequent run of d8 will output information about usage
of basic blocks in builtins.
v8_enable_builtins_profiling_verbose
Current value (from the default) = false
From //v8/BUILD.gn:171
Runs mksnapshot with --turbo-profiling-verbose. After building in this
configuration, any subsequent run of d8 will output information about usage
of basic blocks in builtins, including the schedule and disassembly of all
used builtins.
v8_enable_cet_shadow_stack
Current value (from the default) = false
From //v8/BUILD.gn:365
Change code emission and runtime features to be CET shadow-stack compliant
(incomplete and experimental).
v8_enable_concurrent_marking
Current value (from the default) = true
From //v8/BUILD.gn:151
Controls the default value of v8_enable_concurrent_marking_state. See the
default setting code below.
v8_enable_conservative_stack_scanning
Current value (from the default) = false
From //v8/gni/v8.gni:82
Scan the call stack conservatively during garbage collection.
v8_enable_debug_code
Current value (from the default) = ""
From //v8/BUILD.gn:112
Allow runtime-enabled debug code (with --debug-code). Enabled by default in
debug builds.
Sets -dV8_ENABLE_DEBUG_CODE
v8_enable_debugging_features
Current value (from the default) = false
From //v8/BUILD.gn:38
Turns on all V8 debug features. Enables running V8 in a pseudo debug mode
within a release Chrome.
v8_enable_disassembler
Current value (from the default) = ""
From //v8/BUILD.gn:68
Sets -dENABLE_DISASSEMBLER.
v8_enable_external_code_space
Current value (from the default) = ""
From //v8/BUILD.gn:202
Enable support for external code range relative to the pointer compression
cage.
Sets -dV8_EXTERNAL_CODE_SPACE
v8_enable_fast_mksnapshot
Current value (from the default) = false
From //v8/BUILD.gn:92
Enable fast mksnapshot runs.
v8_enable_fast_torque
Current value (from the default) = ""
From //v8/BUILD.gn:95
Optimize code for Torque executable, even during a debug build.
v8_enable_future
Current value (from the default) = false
From //v8/BUILD.gn:41
Sets -DV8_ENABLE_FUTURE.
v8_enable_gdbjit
Current value = false
From //.gn:36
Overridden from the default = true
From //v8/BUILD.gn:231
v8_enable_google_benchmark
Current value (from the default) = false
From //v8/gni/v8.gni:90
v8_enable_handle_zapping
Current value (from the default) = true
From //v8/BUILD.gn:86
Sets -dENABLE_HANDLE_ZAPPING.
v8_enable_heap_snapshot_verify
Current value (from the default) = ""
From //v8/BUILD.gn:352
Enable runtime verification of heap snapshots produced for devtools.
v8_enable_hugepage
Current value (from the default) = false
From //v8/BUILD.gn:83
Sets -dENABLE_HUGEPAGE
v8_enable_i18n_support
Current value (from the default) = true
From //v8/gni/v8.gni:41
Enable ECMAScript Internationalization API. Enabling this feature will
add a dependency on the ICU library.
v8_enable_ignition_dispatch_counting
Current value (from the default) = false
From //v8/BUILD.gn:160
Sets -dV8_IGNITION_DISPATCH_COUNTING.
Enables counting frequencies of bytecode dispatches. After building in this
configuration, subsequent runs of d8 can output frequencies for each pair
of (current, next) bytecode instructions executed if you specify
--trace-ignition-dispatches-output-file, or can generate a JS object with
those frequencies if you run with --expose-ignition-statistics and call the
extension function getIgnitionDispatchCounters().
v8_enable_inner_pointer_resolution_mb
Current value (from the default) = false
From //v8/gni/v8.gni:88
Use the marking bitmap for inner pointer resolution.
v8_enable_inner_pointer_resolution_osb
Current value (from the default) = false
From //v8/gni/v8.gni:85
Use the object start bitmap for inner pointer resolution.
v8_enable_javascript_promise_hooks
Current value (from the default) = false
From //v8/BUILD.gn:345
Allow for JS promise hooks (instead of just C++).
v8_enable_lazy_source_positions
Current value (from the default) = true
From //v8/BUILD.gn:245
Enable lazy source positions by default.
v8_enable_lite_mode
Current value (from the default) = false
From //v8/gni/v8.gni:64
Lite mode disables a number of performance optimizations to reduce memory
at the cost of performance.
Sets -DV8_LITE_MODE.
v8_enable_maglev
Current value (from the default) = ""
From //v8/BUILD.gn:206
Enable the Maglev compiler.
Sets -dV8_ENABLE_MAGLEV
v8_enable_map_packing
Current value (from the default) = false
From //v8/BUILD.gn:342
Enable map packing & unpacking (sets -dV8_MAP_PACKING).
v8_enable_object_print
Current value (from the default) = ""
From //v8/BUILD.gn:129
Sets -dOBJECT_PRINT.
v8_enable_pointer_compression
Current value (from the default) = ""
From //v8/BUILD.gn:124
Enable pointer compression (sets -dV8_COMPRESS_POINTERS).
v8_enable_pointer_compression_8gb
Current value (from the default) = ""
From //v8/BUILD.gn:376
Enables pointer compression for 8GB heaps.
Sets -DV8_COMPRESS_POINTERS_8GB.
v8_enable_pointer_compression_shared_cage
Current value (from the default) = ""
From //v8/BUILD.gn:125
v8_enable_precise_zone_stats
Current value (from the default) = false
From //v8/BUILD.gn:325
Experimental feature for collecting per-class zone memory stats.
Requires use_rtti = true
v8_enable_regexp_interpreter_threaded_dispatch
Current value (from the default) = true
From //v8/BUILD.gn:270
Use token threaded dispatch for the regular expression interpreter.
Use switch-based dispatch if this is false
v8_enable_runtime_call_stats
Current value (from the default) = true
From //v8/gni/v8.gni:76
Enable runtime call stats.
v8_enable_sandbox
Current value (from the default) = ""
From //v8/BUILD.gn:305
Enable the experimental V8 sandbox.
Sets -DV8_ENABLE_SANDBOX.
v8_enable_sandbox_future
Current value (from the default) = false
From //v8/BUILD.gn:316
Enable all available sandbox features. Implies v8_enable_sandbox.
v8_enable_sandboxed_external_pointers
Current value (from the default) = false
From //v8/BUILD.gn:309
Enable sandboxing for all external pointers. Requires v8_enable_sandbox.
Sets -DV8_SANDBOXED_EXTERNAL_POINTERS.
v8_enable_sandboxed_pointers
Current value (from the default) = false
From //v8/BUILD.gn:313
Enable sandboxed pointers. Requires v8_enable_sandbox.
Sets -DV8_SANDBOXED_POINTERS.
v8_enable_shared_ro_heap
Current value (from the default) = ""
From //v8/BUILD.gn:242
Enable sharing read-only space across isolates.
Sets -DV8_SHARED_RO_HEAP.
v8_enable_short_builtin_calls
Current value (from the default) = ""
From //v8/BUILD.gn:197
Enable short builtins call instruction sequences by un-embedding builtins.
Sets -dV8_SHORT_BUILTIN_CALLS
v8_enable_single_generation
Current value (from the default) = ""
From //v8/BUILD.gn:266
Redirect allocation in young generation so that there will be
only one single generation.
v8_enable_slow_dchecks
Current value (from the default) = false
From //v8/BUILD.gn:89
Enable slow dchecks.
v8_enable_snapshot_code_comments
Current value (from the default) = false
From //v8/BUILD.gn:102
Enable code comments for builtins in the snapshot (impacts performance).
This also enables v8_code_comments.
v8_enable_snapshot_compression
Current value (from the default) = false
From //v8/BUILD.gn:281
v8_enable_snapshot_native_code_counters
Current value (from the default) = ""
From //v8/BUILD.gn:118
Enable native counters from the snapshot (impacts performance, sets
-dV8_SNAPSHOT_NATIVE_CODE_COUNTERS).
This option will generate extra code in the snapshot to increment counters,
as per the --native-code-counters flag.
v8_enable_swiss_name_dictionary
Current value (from the default) = false
From //v8/BUILD.gn:329
Experimental feature that uses SwissNameDictionary instead of NameDictionary
as the backing store for all dictionary mode objects.
v8_enable_system_instrumentation
Current value (from the default) = false
From //v8/BUILD.gn:44
Sets -DSYSTEM_INSTRUMENTATION. Enables OS-dependent event tracing
v8_enable_test_features
Current value (from the default) = ""
From //v8/BUILD.gn:193
Enables various testing features.
v8_enable_third_party_heap
Current value (from the default) = false
From //v8/BUILD.gn:248
Enable third party HEAP library
v8_enable_trace_baseline_exec
Current value (from the default) = false
From //v8/BUILD.gn:140
v8_enable_trace_feedback_updates
Current value (from the default) = false
From //v8/BUILD.gn:143
Sets -dV8_TRACE_FEEDBACK_UPDATES.
v8_enable_trace_ignition
Current value (from the default) = false
From //v8/BUILD.gn:139
v8_enable_trace_maps
Current value (from the default) = ""
From //v8/BUILD.gn:132
Sets -dV8_TRACE_MAPS.
v8_enable_trace_unoptimized
Current value (from the default) = ""
From //v8/BUILD.gn:138
Sets -dV8_TRACE_UNOPTIMIZED.
v8_enable_unconditional_write_barriers
Current value (from the default) = false
From //v8/BUILD.gn:262
Ensure that write barriers are always used.
Useful for debugging purposes.
v8_enable_v8_checks
Current value (from the default) = ""
From //v8/BUILD.gn:135
Sets -dV8_ENABLE_CHECKS.
v8_enable_verify_csa
Current value (from the default) = false
From //v8/BUILD.gn:121
Enable code-generation-time checking of types in the CodeStubAssembler.
v8_enable_verify_heap
Current value (from the default) = ""
From //v8/BUILD.gn:50
Sets -DVERIFY_HEAP.
v8_enable_verify_predictable
Current value (from the default) = false
From //v8/BUILD.gn:53
Sets -DVERIFY_PREDICTABLE
v8_enable_vtunejit
Current value (from the default) = false
From //v8/BUILD.gn:77
Sets -dENABLE_VTUNE_JIT_INTERFACE.
v8_enable_vtunetracemark
Current value (from the default) = false
From //v8/BUILD.gn:80
Sets -dENABLE_VTUNE_TRACEMARK.
v8_enable_wasm_gdb_remote_debugging
Current value (from the default) = false
From //v8/gni/v8.gni:59
Enable WebAssembly debugging via GDB-remote protocol.
v8_enable_wasm_simd256_revec
Current value (from the default) = false
From //v8/gni/v8.gni:73
Enable 256-bit long vector re-vectorization pass in WASM compilation pipeline.
v8_enable_webassembly
Current value (from the default) = ""
From //v8/gni/v8.gni:70
Include support for WebAssembly. If disabled, the 'WebAssembly' global
will not be available, and embedder APIs to generate WebAssembly modules
will fail. Also, asm.js will not be translated to WebAssembly and will be
executed as standard JavaScript instead.
v8_enable_zone_compression
Current value (from the default) = ""
From //v8/BUILD.gn:301
Enable V8 zone compression experimental feature.
Sets -DV8_COMPRESS_ZONES.
v8_etw_guid
Current value (from the default) = ""
From //v8/BUILD.gn:47
Sets the GUID for the ETW provider
v8_expose_memory_corruption_api
Current value (from the default) = false
From //v8/BUILD.gn:321
Expose the memory corruption API to JavaScript. Useful for testing the sandbox.
WARNING This will expose builtins that (by design) cause memory corruption.
Sets -DV8_EXPOSE_MEMORY_CORRUPTION_API
v8_expose_symbols
Current value (from the default) = false
From //v8/gni/v8.gni:50
Expose symbols for dynamic linking.
v8_fuchsia_use_vmex_resource
Current value (from the default) = false
From //v8/BUILD.gn:372
Get VMEX priviledge at startup.
It allows to run V8 without "deprecated-ambient-replace-as-executable".
Sets -DV8_USE_VMEX_RESOURCE.
TODO(victorgomes): Remove this flag once Chormium no longer needs
the deprecated feature.
v8_fuzzilli
Current value (from the default) = false
From //v8/gni/v8.gni:79
Add fuzzilli fuzzer support.
v8_gcmole
Current value (from the default) = false
From //v8/gni/v8.gni:27
Indicate if gcmole was fetched as a hook to make it available on swarming.
v8_generate_external_defines_header
Current value (from the default) = false
From //v8/BUILD.gn:333
If enabled then macro definitions that are used in externally visible
header files are placed in a separate header file v8-gn.h.
v8_has_valgrind
Current value (from the default) = false
From //v8/gni/v8.gni:24
Indicate if valgrind was fetched as a custom deps to make it available on
swarming.
v8_imminent_deprecation_warnings
Current value = false
From //.gn:37
Overridden from the default = true
From //v8/BUILD.gn:59
Enable compiler warnings when using V8_DEPRECATE_SOON apis.
v8_monolithic
Current value (from the default) = false
From //v8/gni/v8.gni:47
Enable monolithic static library for embedders.
v8_multi_arch_build
Current value (from the default) = false
From //v8/gni/v8.gni:20
Adds additional compile target for building multiple architectures at once.
v8_no_inline
Current value (from the default) = false
From //v8/BUILD.gn:217
Switches off inlining in V8.
v8_optimized_debug
Current value (from the default) = true
From //v8/gni/v8.gni:30
Turns on compiler optimizations in V8 in Debug build.
v8_os_page_size
Current value (from the default) = "0"
From //v8/BUILD.gn:220
Override OS page size when generating snapshot
v8_postmortem_support
Current value (from the default) = false
From //v8/BUILD.gn:211
With post mortem support enabled, metadata is embedded into libv8 that
describes various parameters of the VM for use by debuggers. See
tools/gen-postmortem-metadata.py for details.
v8_promise_internal_field_count
Current value (from the default) = 0
From //v8/BUILD.gn:71
Sets the number of internal fields on promise objects.
v8_scriptormodule_legacy_lifetime
Current value (from the default) = false
From //v8/BUILD.gn:361
TODO(cbruni, v8:12302): Remove once API is migrated
Enable legacy mode for ScriptOrModule's lifetime. By default it's a
temporary object, if enabled it will be kept alive by the parent Script.
This is only used by nodejs.
v8_snapshot_toolchain
Current value (from the default) = ""
From //v8/gni/snapshot_toolchain.gni:34
The v8 snapshot needs to be built by code that is compiled with a
toolchain that matches the bit-width of the target CPU, but runs on
the host.
v8_static_library
Current value (from the default) = false
From //v8/gni/v8.gni:44
Use static libraries instead of source_sets.
v8_symbol_level
Current value (from the default) = 0
From //v8/gni/v8.gni:56
Override global symbol level setting for v8.
v8_target_cpu
Current value (from the default) = ""
From //build/config/v8_target_cpu.gni:33
This arg is used when we want to tell the JIT-generating v8 code
that we want to have it generate for an architecture that is different
than the architecture that v8 will actually run on; we then run the
code under an emulator. For example, we might run v8 on x86, but
generate arm code and run that under emulation.
This arg is defined here rather than in the v8 project because we want
some of the common architecture-specific args (like arm_float_abi or
mips_arch_variant) to be set to their defaults either if the current_cpu
applies *or* if the v8_current_cpu applies.
As described below, you can also specify the v8_target_cpu to use
indirectly by specifying a `custom_toolchain` that contains v8_$cpu in the
name after the normal toolchain.
For example, `gn gen --args="custom_toolchain=...:clang_x64_v8_arm64"`
is equivalent to setting --args=`v8_target_cpu="arm64"`. Setting
`custom_toolchain` is more verbose but makes the toolchain that is
(effectively) being used explicit.
v8_target_cpu can only be used to target one architecture in a build,
so if you wish to build multiple copies of v8 that are targeting
different architectures, you will need to do something more
complicated involving multiple toolchains along the lines of
custom_toolchain, above.
v8_third_party_heap_files
Current value (from the default) = []
From //v8/BUILD.gn:254
Source code used by third party heap
v8_third_party_heap_libs
Current value (from the default) = []
From //v8/BUILD.gn:251
Libaries used by third party heap
v8_typed_array_max_size_in_heap
Current value (from the default) = 64
From //v8/BUILD.gn:229
Controls the threshold for on-heap/off-heap Typed Arrays.
v8_use_external_startup_data
Current value (from the default) = ""
From //v8/gni/v8.gni:37
Use external files for startup data blobs:
the JS builtins sources and the start snapshot.
v8_use_mips_abi_hardfloat
Current value (from the default) = true
From //v8/BUILD.gn:226
Similar to the ARM hard float ABI but on MIPS.
v8_use_perfetto
Current value (from the default) = false
From //v8/gni/v8.gni:53
Implement tracing using Perfetto (https://perfetto.dev).
v8_use_siphash
Current value (from the default) = false
From //v8/BUILD.gn:214
Use Siphash as added protection against hash flooding attacks.
v8_verify_torque_generation_invariance
Current value (from the default) = false
From //v8/BUILD.gn:274
Enable additional targets necessary for verification of torque
file generation
v8_win64_unwinding_info
Current value (from the default) = true
From //v8/BUILD.gn:98
Enable the registration of unwinding info for Windows x64 and ARM64.
vma_vulkan_headers_dir
Current value (from the default) = "//third_party/vulkan-deps/vulkan-headers/src"
From //third_party/vulkan_memory_allocator/BUILD.gn:8
weblayer_in_split
Current value (from the default) = true
From //weblayer/variables.gni:12
Whether WebLayer will be included as a DFM.
webview_includes_weblayer
Current value (from the default) = true
From //weblayer/variables.gni:9
Include the //weblayer code in WebView implementation APKs.
widevine_root
Current value (from the default) = "."
From //third_party/widevine/cdm/widevine.gni:62
Relative root directory to //third_party/widevine/cdm for CDM files.
Can be overridden if the CDM files are located in other places.
win_console_app
Current value (from the default) = false
From //build/config/win/console_app.gni:12
If true, builds as a console app (rather than a windowed app), which allows
logging to be printed to the user. This will cause a terminal window to pop
up when the executable is not run from the command line, so should only be
used for development. Only has an effect on Windows builds.
Raw
list.sh
#get chromium build options
# https://www.chromium.org/developers/gn-build-configuration/
WS=$(mktemp -d)
cd $WS
git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
export PATH="$PATH:$WS/depot_tools"
mkdir $WS/chromium && cd $WS/chromium
fetch --nohooks chromium
cd src
gclient runhooks
gn gen --args='is_debug=false is_component_ffmpeg=true proprietary_codecs=true ffmpeg_branding="Chrome"' out/Default
gn args out/Default --list
#gn args out/Default --list=is_component_build
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