Current value (from the default): ""
From //build/images/args.gni:89
Whether to include images necessary to run Fuchsia in QEMU in build archives.
Current value (from the default): false
From //build/images/args.gni:96
Additional bootserver args to add to pave.sh. New uses of this should be added with caution, and ideally discussion. The present use case is to enable throttling of netboot when specific network adapters are combined with specific boards, due to driver and hardware challenges.
Current value (from the default): ""
From //build/images/args.gni:102
List of file paths to every font asset. Populated in fonts.gni.
Current value (from the default): []
From //src/fonts/build/font_args.gni:35
Build boot images that prefer Zedboot over local boot (only for EFI).
Current value (from the default): false
From //build/images/args.gni:114
Default AddressSanitizer options (before the ASAN_OPTIONS environment variable is read at runtime). This can be set as a build argument to affect most “asan” variants in known_variants (which see), or overridden in toolchain_args in one of those variants. Note that setting this nonempty may conflict with programs that define their own __asan_default_options C function.
Current value (from the default): ""
From //build/config/sanitizers/BUILD.gn:16
Set to |true| to enable collecting execution traces of audio_core, or |false| to remove all tracing overhead.
Current value (from the default): true
From //src/media/audio/audio_core/BUILD.gn:13
Whether basemgr should automatically login as a persistent guest user.
Current value (from the default): false
From //src/modular/bin/basemgr/BUILD.gn:14
Whether the component loader should automatically update packages.
Current value (from the default): true
From //src/sys/sysmgr/BUILD.gn:10
AVB algorithm type.Supported options: SHA256_RSA2048 SHA256_RSA4096 SHA256_RSA8192 SHA512_RSA2048 SHA512_RSA4096 SHA512_RSA8192
Current value (from the default): "SHA512_RSA4096"
From //build/images/vbmeta.gni:29
AVB metadata which will be used to validate public key
Current value (from the default): ""
From //build/images/vbmeta.gni:20
a key which will be used to sign VBMETA and images for AVB
Current value (from the default): ""
From //build/images/vbmeta.gni:17
Whether to allow testonly=true targets in base/cache pacakges. Default to true to allow testonly=true targets. It is preferrable to set to false for production builds to avoid accidental inclusion of testing targets.
Current value (from the default): true
From //BUILD.gn:72
If you add package labels to this variable, the packages will be included in the ‘base’ package set, which represents the set of packages that are part of an OTA. These pacakages are updated as an atomic unit during an OTA process and are immutable and are a superset of the TCB (Trusted Computing Base) for a product. These packages are never evicted by the system.
Current value for target_cpu = "arm64": ["//build/info:build-info", "//garnet/bin/http", "//src/connectivity/network/http_client", "//garnet/bin/log_listener:log_listener", "//garnet/bin/log_listener:log_listener_shell", "//garnet/bin/network_time_service", "//garnet/bin/scpi", "//garnet/bin/setui:setui_service", "//garnet/bin/sshd-host", "//garnet/bin/sshd-host:config", "//garnet/bin/sysmgr", "//garnet/bin/sysmgr:network_config", "//garnet/bin/sysmgr:services_config", "//garnet/bin/timezone", "//src/cobalt/bin/app:cobalt", "//src/cobalt/bin/app:cobalt_registry", "//src/cobalt/bin/app:config", "//src/cobalt/bin/system-metrics:cobalt_system_metrics", "//src/connectivity/bluetooth:core", "//src/connectivity/management/reachability", "//src/connectivity/management/reachability:reachability_sysmgr_config", "//src/connectivity/management:network_config_default", "//src/connectivity/network/mdns/bundles:config", "//src/connectivity/network/mdns/bundles:services", "//src/connectivity/network/net-cli", "//src/connectivity/network:config", "//src/connectivity/wlan:packages", "//src/connectivity/wlan/config:default", "//src/developer/exception_broker", "//src/developer/feedback/bugreport", "//src/developer/feedback/crash_reports:crash-reports", "//src/developer/feedback/feedback_data:feedback_agent", "//src/developer/feedback/reboot_info:reboot-info", "//src/developer/remote-control:pkg", "//src/diagnostics/archivist", "//src/diagnostics/archivist:with_default_config", "//src/hwinfo:hwinfo", "//src/hwinfo:default_product_config", "//src/media/audio/bundles:audio_config", "//src/recovery/factory_reset", "//src/security/policy:appmgr_policy_eng", "//src/security/root_ssl_certificates", "//src/sys/appmgr", "//src/sys/appmgr:appmgr_scheme_config", "//src/sys/appmgr:core_component_id_index", "//src/sys/core", "//src/sys/device_settings:device_settings_manager", "//src/sys/pkg:core", "//src/sys/pkg:pkgfs-disable-executability-restrictions", "//src/sys/pkg:system-update-checker", "//src/sys/pkg/bin/pkg-resolver:enable_dynamic_configuration", "//src/sys/stash:pkg", "//src/sys/timekeeper", "//third_party/openssh-portable/fuchsia/developer-keys:ssh_config", "//build/rust:cargo_toml_gen", "//src/sys/pkg:tools", "//tools/cargo-gnaw", "//bundles:kitchen_sink"]
From //root_build_dir/args.gn:3
Overridden from the default: []
From //BUILD.gn:21
Current value for target_cpu = "x64": ["//build/info:build-info", "//garnet/bin/http", "//src/connectivity/network/http_client", "//garnet/bin/log_listener:log_listener", "//garnet/bin/log_listener:log_listener_shell", "//garnet/bin/network_time_service", "//garnet/bin/scpi", "//garnet/bin/setui:setui_service", "//garnet/bin/sshd-host", "//garnet/bin/sshd-host:config", "//garnet/bin/sysmgr", "//garnet/bin/sysmgr:network_config", "//garnet/bin/sysmgr:services_config", "//garnet/bin/timezone", "//src/cobalt/bin/app:cobalt", "//src/cobalt/bin/app:cobalt_registry", "//src/cobalt/bin/app:config", "//src/cobalt/bin/system-metrics:cobalt_system_metrics", "//src/connectivity/bluetooth:core", "//src/connectivity/management/reachability", "//src/connectivity/management/reachability:reachability_sysmgr_config", "//src/connectivity/management:network_config_default", "//src/connectivity/network/mdns/bundles:config", "//src/connectivity/network/mdns/bundles:services", "//src/connectivity/network/net-cli", "//src/connectivity/network:config", "//src/connectivity/wlan:packages", "//src/connectivity/wlan/config:default", "//src/developer/exception_broker", "//src/developer/feedback/bugreport", "//src/developer/feedback/crash_reports:crash-reports", "//src/developer/feedback/feedback_data:feedback_agent", "//src/developer/feedback/reboot_info:reboot-info", "//src/developer/remote-control:pkg", "//src/diagnostics/archivist", "//src/diagnostics/archivist:with_default_config", "//src/hwinfo:hwinfo", "//src/hwinfo:default_product_config", "//src/media/audio/bundles:audio_config", "//src/recovery/factory_reset", "//src/security/policy:appmgr_policy_eng", "//src/security/root_ssl_certificates", "//src/sys/appmgr", "//src/sys/appmgr:appmgr_scheme_config", "//src/sys/appmgr:core_component_id_index", "//src/sys/core", "//src/sys/device_settings:device_settings_manager", "//src/sys/pkg:core", "//src/sys/pkg:pkgfs-disable-executability-restrictions", "//src/sys/pkg:system-update-checker", "//src/sys/pkg/bin/pkg-resolver:enable_dynamic_configuration", "//src/sys/stash:pkg", "//src/sys/timekeeper", "//third_party/openssh-portable/fuchsia/developer-keys:ssh_config", "//build/rust:cargo_toml_gen", "//src/sys/pkg:tools", "//tools/cargo-gnaw", "//bundles:kitchen_sink"]
From //root_build_dir/args.gn:3
Overridden from the default: []
From //BUILD.gn:21
For build/images:fvm.blob.sparse.blk, use this argument.
Current value (from the default): ""
From //build/images/fvm.gni:70
For build/images:fvm.blob.sparse.blk, use this argument.
Current value (from the default): ""
From //build/images/fvm.gni:56
For build/images:fvm.blob.sparse.blk, use this argument.
Current value (from the default): ""
From //build/images/fvm.gni:45
In addition to reserving space for inodes and data, fs needs additional space for maintaining some internal data structures. So the space required to reserve inodes and data may exceed sum of the space needed for inodes and data. maximum_bytes puts an upper bound on the total bytes reserved for inodes, data bytes and reservation for all other internal fs metadata. An empty string does not put any upper bound. A filesystem may reserve few blocks required for its operations.
Current value (from the default): ""
From //build/images/fvm.gni:66
Number of bytes to reserve for data in the fs. This is in addition to what is reserved, if any, for the inodes. Data bytes constitutes “usable” space of the fs. An empty string does not reserve any additional space than minimum required for the filesystem.
Current value (from the default): ""
From //build/images/fvm.gni:52
minimum_inodes is the number of inodes to reserve for the fs An empty string does not reserve any additional space than minimum required for the filesystem.
Current value (from the default): ""
From //build/images/fvm.gni:41
A list of bootfs manifest labels to include in the ZBI.
Current value for target_cpu = "arm64": ["//garnet/bin/power_manager/node_config:base.manifest"]
From //boards/arm64.gni:18
Overridden from the default: []
From //build/board.gni:14
Current value for target_cpu = "x64": ["//garnet/bin/power_manager/node_config:base.manifest"]
From //boards/x64.gni:19
Overridden from the default: []
From //build/board.gni:14
Board level extra vbmeta images to be combined into the top-level vbmeta struct.
Current value (from the default): []
From //build/images/vbmeta.gni:36
Board files can set this to true if they have a package with a mali libvulkan VCD.
Current value (from the default): false
From //src/graphics/lib/magma/gnbuild/magma.gni:49
List of kernel command line this board to bake into the boot image that are required by this board. See also kernel_cmdline_args in //build/images/BUILD.gn
Current value (from the default): []
From //build/board.gni:19
Board name used for paving and amber updates.
Current value for target_cpu = "arm64": "qemu-arm64"
From //boards/arm64.gni:7
Overridden from the default: ""
From //build/board.gni:7
Current value for target_cpu = "x64": "x64"
From //boards/x64.gni:7
Overridden from the default: ""
From //build/board.gni:7
A list of package labels to include in the ‘base’ package set. Used by the board definition rather than the product definition.
Current value for target_cpu = "arm64": ["//garnet/bin/thermd", "//garnet/bin/thermd:config", "//garnet/packages/prod:drivers", "//src/media/audio/bundles:virtual_audio_driver"]
From //boards/arm64.gni:9
Overridden from the default: []
From //build/board.gni:11
Current value for target_cpu = "x64": ["//garnet/bin/thermd", "//garnet/bin/thermd:config", "//garnet/packages/prod:drivers", "//src/hwinfo:default_board_config", "//src/media/audio/bundles:virtual_audio_driver"]
From //boards/x64.gni:9
Overridden from the default: []
From //build/board.gni:11
List of kernel command line arguments to bake into the zedboot image that are required by this board. See also zedboot_cmdline_args in //build/images/zedboot/BUILD.gn
Current value (from the default): []
From //build/board.gni:24
List of binaries to include in the bootfs manifest for recovery. This overrides the option set by bootfs_zircon_groups so that only the requested binaries are included in the final image.
Current value (from the default): []
From //build/images/recovery/BUILD.gn:15
List of extra manifest entries for files to add to the BOOTFS. Each entry can be a “TARGET=SOURCE” string, or it can be a scope with sources and outputs in the style of a copy() target: outputs[0] is used as TARGET (see gn help source_expansion).
Current value (from the default): []
From //build/images/args.gni:35
Put the “system image” package in the BOOTFS. Hence what would otherwise be /system/... at runtime is /boot/... instead.
Current value for target_cpu = "arm64": false
From //products/core.gni:11
Overridden from the default: false
From //build/images/args.gni:14
Current value for target_cpu = "x64": false
From //products/core.gni:11
Overridden from the default: false
From //build/images/args.gni:14
(deprecated) HW revision of the bootloader to be included into OTA package and paving process.
See firmware_prebuilts_path_suffix instead.
Current value (from the default): ""
From //build/images/args.gni:53
(deprecated) Prebuilt bootloader image to be included into update (OTA) package and paving process.
See firmware_prebuilts instead.
Current value (from the default): ""
From //build/images/args.gni:47
Current value (from the default): false
From //src/media/codec/examples/BUILD.gn:10
Build ID algorithm to use for Fuchsia-target code. This does not apply to host or guest code. The value is the argument to the linker‘s --build-id=... switch. If left empty (the default), the linker’s default format is used.
Current value (from the default): ""
From //build/config/fuchsia/BUILD.gn:16
Board configuration of the current build
Current value (from the default): "qemu-arm64"
From //build/info/info.gni:12
Product configuration of the current build
Current value (from the default): ""
From //build/info/info.gni:9
Logical version of the current build. If not set, defaults to the timestamp of the most recent update.
Current value (from the default): ""
From //build/info/info.gni:16
Targets that will be built as mali vulkan ICDS.
Current value (from the default): []
From //src/graphics/lib/magma/gnbuild/magma.gni:37
This is a list of targets that will be built as goldfish vulkan ICDs.
Current value (from the default): []
From //src/graphics/lib/goldfish-vulkan/gnbuild/BUILD.gn:14
Targets that will be built as IMG vulkan ICDS.
Current value (from the default): []
From //src/graphics/lib/magma/gnbuild/magma.gni:46
Targets that will be built as qualcomm vulkan ICDS.
Current value (from the default): []
From //src/graphics/lib/magma/gnbuild/magma.gni:43
Targets that will be built as verisilicon vulkan ICDS.
Current value (from the default): []
From //src/graphics/lib/magma/gnbuild/magma.gni:40
Whether to build SDK tarballs.
Current value (from the default): false
From //build/sdk/config.gni:7
If you add package labels to this variable, the packages will be included in the ‘cache’ package set, which represents an additional set of software that is made available on disk immediately after paving and in factory flows. These packages are not updated with an OTA, but instead are updated ephemerally. This cache of software can be evicted by the system if storage pressure arises or other policies indicate.
Current value for target_cpu = "arm64": []
From //products/core.gni:96
Overridden from the default: []
From //BUILD.gn:29
Current value for target_cpu = "x64": []
From //products/core.gni:96
Overridden from the default: []
From //BUILD.gn:29
Current value (from the default): false
From //src/camera/debug.gni:6
Whether to perform check on the build's eligibility for production. If true, base_packages and cache_packages are checked against dependencies on //build/validate:non_production_tag, which is used to tag any non-production GN labels. Build will fail if such dependency is found.
Current value (from the default): false
From //build/images/args.gni:108
Path to Clang lib directory.
Current value (from the default): "../build/prebuilt/third_party/clang/linux-x64/lib"
From //build/images/manifest.gni:9
The default clang toolchain provided by the prebuilt. This variable is additionally consumed by the Go toolchain.
Current value (from the default): "../prebuilt/third_party/clang/linux-x64/bin"
From //build/config/clang/clang.gni:12
Selects the Cobalt environment to send data to. Choices: “LOCAL” - record log data locally to a file “DEVEL” - the non-prod environment for use in testing “PROD” - the production environment
Current value (from the default): "PROD"
From //src/cobalt/bin/app/BUILD.gn:15
Whether to compress the blobfs image.
Current value (from the default): true
From //build/images/args.gni:111
Maximum number of Dart processes to run in parallel.
Dart analyzer uses a lot of memory which may cause issues when building with many parallel jobs e.g. when using goma. To avoid out-of-memory errors we explicitly reduce the number of jobs.
Current value (from the default): 32
From //build/dart/BUILD.gn:15
Maximum number of Go processes to run in parallel.
Current value (from the default): 32
From //build/go/BUILD.gn:11
Maximum number of concurrent link jobs.
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.
Current value (from the default): 32
From //build/toolchain/BUILD.gn:15
Maximum number of Rust processes to run in parallel.
We run multiple rustc jobs in parallel, each of which can cause significant amount of memory, especially when using LTO. To avoid out-of-memory errors we explicitly reduce the number of jobs.
Current value (from the default): 32
From //build/rust/BUILD.gn:15
Tells openweave to include files that require heap access.
Current value (from the default): true
From //third_party/openweave-core/config.gni:32
Clang crash reports directory path. Use empty path to disable altogether.
Current value (from the default): "//root_build_dir/clang-crashreports"
From //build/config/BUILD.gn:13
Current value (from the default): "fuchsia"
From //third_party/crashpad/build/crashpad_buildconfig.gni:22
Current value (from the default): true
From //third_party/crashpad/util/net/tls.gni:22
Current value (from the default): false
From //third_party/dart/runtime/runtime_args.gni:104
Current value (from the default): ""
Current value (from the default): ""
If non-empty, the given script will be invoked to produce a signed ZBI image. The given script must accept -z for the input zbi path, and -o for the output signed zbi path. The path must be in GN-label syntax (i.e. starts with //).
Current value (from the default): ""
From //build/images/custom_signing.gni:12
Current value (from the default): "static_library"
From //third_party/dart/runtime/runtime_args.gni:80
Controls the kind of core snapshot linked into the standalone VM. Using a core-jit snapshot breaks the ability to change various flags that affect code generation.
Current value (from the default): "core"
From //third_party/dart/runtime/runtime_args.gni:56
When this argument is a non-empty string, the version repoted by the Dart VM will be one that is compatible with pub's interpretation of semantic version strings. The version string will also include the values of the argument. In particular the version string will read:
"M.m.p-dev.x.x-$(dart_custom_version_for_pub)-$(short_git_hash)"
Where ‘M’, ‘m’, and ‘p’ are the major, minor and patch version numbers, and ‘dev.x.x’ is the dev version tag most recently preceeding the current revision. The short git hash can be omitted by setting dart_version_git_info=false
Current value (from the default): ""
From //third_party/dart/runtime/runtime_args.gni:73
Instead of using is_debug, we introduce a different flag for specifying a Debug build of Dart so that clients can still use a Release build of Dart while themselves doing a Debug build.
Current value (from the default): false
From //third_party/dart/runtime/runtime_args.gni:9
The optimization level to use for debug builds. Defaults to 0 for builds with code coverage enabled.
Current value (from the default): "2"
From //third_party/dart/runtime/runtime_args.gni:36
Controls whether dart_app() targets generate JIT or AOT Dart snapshots. This defaults to JIT, use `fx set --args ‘dart_default_app=“dart_aot_app”’ to switch to AOT.
Current value (from the default): "dart_jit_app"
From //topaz/runtime/dart/dart_component.gni:19
Whether dart:wasm should be enabled.
Current value (from the default): false
From //third_party/dart/runtime/runtime_args.gni:94
Forces all Dart and Flutter apps to build in a specific configuration that we use to build products.
Current value (from the default): false
From //topaz/runtime/dart/config.gni:10
Whether libdart should export the symbols of the Dart API.
Current value (from the default): true
From //third_party/dart/runtime/runtime_args.gni:91
Controls whether the VM uses bytecode.
Current value (from the default): false
From //third_party/dart/runtime/runtime_args.gni:84
Set the runtime mode. This affects how the runtime is built and what features it has. Valid values are: ‘develop’ (the default) - VM is built to run as a JIT with all development features enabled. ‘profile’ - The VM is built to run with AOT compiled code with only the CPU profiling features enabled. ‘release’ - The VM is built to run with AOT compiled code with no developer features enabled.
These settings are only used for Flutter, at the moment. A standalone build of the Dart VM should leave this set to “develop”, and should set ‘is_debug’, ‘is_release’, or ‘is_product’.
TODO(rmacnak): dart_runtime_mode no longer selects whether libdart is build for JIT or AOT, since libdart waw split into libdart_jit and libdart_precompiled_runtime. We should remove this flag and just set dart_debug/dart_product.
Current value (from the default): "develop"
From //third_party/dart/runtime/runtime_args.gni:28
Current value (from the default): "kernel"
From //third_party/dart/utils/application_snapshot.gni:15
Whether experimental space dart mode is enabled for Dart applications.
Current value (from the default): false
From //topaz/runtime/dart/dart_component.gni:35
Explicitly set the target architecture to use a simulator. Available options are: arm, arm64, x64, ia32.
Current value (from the default): "arm64"
From //third_party/dart/runtime/runtime_args.gni:32
Whether to link Crashpad library for crash handling. Only supported on Windows for now.
Current value (from the default): false
From //third_party/dart/runtime/runtime_args.gni:51
Whether to fall back to built-in root certificates when they cannot be verified at the operating system level.
Current value (from the default): false
From //third_party/dart/runtime/runtime_args.gni:43
Whether to link the standalone VM against tcmalloc. The standalone build of the VM enables this only for Linux builds.
Current value (from the default): false
From //third_party/dart/runtime/runtime_args.gni:47
Whether the Dart binary version string should include the git hash and git commit time.
Current value (from the default): true
From //third_party/dart/runtime/runtime_args.gni:60
Whether to enable code coverage for the standalone VM.
Current value (from the default): false
From //third_party/dart/runtime/runtime_args.gni:39
Path to manifest file containing data to place into the initial /data partition.
Current value (from the default): ""
From //build/images/args.gni:72
Current value (from the default): false
From //src/virtualization/packages/debian_guest/BUILD.gn:10
Package the rootfs as a QCOW image (as opposed to a flat file).
Current value (from the default): true
From //src/virtualization/packages/debian_guest/BUILD.gn:9
Use this flag to optimize source libraries imported from Zircon the same was as other libraries in this build. By default, they are optimized the same as in the ZN build, which leaves less debugging information available.
Current value (from the default): false
From //build/unification/config/BUILD.gn:10
Absolute path to the .git folder.
This is used in rules that need to refer to .git/logs/HEAD to include a hash in the version string. By default the folder is .git, but we define it as an argument so it can be overriden by users of git-worktree (See Issue #33619).
When using git-worktree, you can add
default_git_folder = “/path/to/main/git/repo/.git/worktrees/name/”
to out/ReleaseX64/args.gn. The path above can be extracted from the .git file under the git worktree folder.
Current value (from the default): "//third_party/dart//.git"
From //third_party/dart/sdk_args.gni:25
List of arguments to add to /boot/config/devmgr. These come after synthesized arguments to configure blobfs and pkgfs.
Current value (from the default): []
From //build/images/args.gni:18
Detect dart API changes TODO(fxb/36723, fxb/6623) Remove this flag once issues are resolved
Current value (from the default): false
From //build/dart/dart_library.gni:17
Enable all dart analysis
Current value (from the default): true
From //build/dart/dart_library.gni:13
Controls whether the compiler emits full stack frames for function calls. This reduces performance but increases the ability to generate good stack traces, especially when we have bugs around unwind table generation. It applies only for Fuchsia targets (see below where it is unset).
TODO(ZX-2361): Theoretically unwind tables should be good enough so we can remove this option when the issues are addressed.
Current value (from the default): true
From //build/config/BUILD.gn:23
Current value (from the default): true
From //src/ui/scenic/bin/BUILD.gn:11
Current value (from the default): true
From //src/ui/scenic/bin/BUILD.gn:12
Enables the tracing feature of mdns, which can be turned on using “mdns-util verbose”.
Current value (from the default): false
From //src/connectivity/network/mdns/service/BUILD.gn:15
Whether to build the netboot zbi by default.
You can still build //build/images:netboot explicitly even if enable_netboot is false.
Current value (from the default): false
From //build/images/args.gni:77
Current value (from the default): false
From //src/devices/bus/drivers/pci/pci.gni:6
If true, this enables the |SpirvNotChangedTest| to check if the precompiled shaders on disk are up to date and reflect the current shader source code compiled with the latest shaderc tools/optimizations. People on the Scenic team should build with this flag turned on to make sure that any shader changes that were not run through the precompiler have their updated spirv written to disk. Other teams and CQ do not need to worry about this flag.
Current value (from the default): false
From //src/ui/lib/escher/build_args.gni:26
Using Vulkan on host (i.e. Linux) is an involved affair that involves downloading the Vulkan SDK, setting environment variables, and so forth... all things that are difficult to achieve in a CQ environment. Therefore, by default we use a stub implementation of Vulkan which fails to create a VkInstance. This allows everything to build, and also allows running Escher unit tests which don't require Vulkan.
Current value (from the default): true
From //src/ui/lib/escher/build_args.gni:12
Determines whether or not escher will build with the glslang and shaderc libraries. When false, these libraries will not be included in the scenic/ escher binary and as a result shaders will not be able to be compiled at runtime. Precompiled spirv code will be loaded into memory from disk instead.
Current value (from the default): false
From //src/ui/lib/escher/build_args.gni:18
Whether the VM includes the kernel service in all modes (debug, release, product).
Current value (from the default): false
From //third_party/dart/runtime/runtime_args.gni:88
If true, excludes syscalls with the [testonly] attribute.
Current value (from the default): false
From //zircon/vdso/vdso.gni:7
Current value (from the default): "//third_party/expat"
From //src/graphics/lib/magma/gnbuild/magma.gni:14
Selects the SoftMAC client implementation to use. Choices: false (default) - C++ Client MLME implementation true - Rust Client MLME implementation This argument is temporary until Rust MLME is ready to be used.
Current value (from the default): false
From //src/connectivity/wlan/lib/mlme/cpp/BUILD.gn:10
Extra args to globally apply to the manifest generation script.
Current value (from the default): []
From //build/images/manifest.gni:12
Current value (from the default): []
From //third_party/cobalt/BUILD.gn:9
Additional variant toolchain configs to support. This is just added to known_variants.
Current value (from the default): []
From //build/config/BUILDCONFIG.gn:654
Current value (from the default): ""
From //build/images/args.gni:91
TODO(fxb/41298): This is a temporary change to activate writing the v1 FIDL wire-format selectively. Remove this when all bindings start writing v1 wire-format by default.
Current value (from the default): true
From //build/fidl/wireformat.gni:9
Use this flag to exclude artifacts from Astro builds. This is a very hacky way of ensuring that the resulting fuchsia.zbi fits within the available space on device. This will soon enough be replaced with a proper way to select image artifacts based on board / product properties. Artifacts that are known to not be useful on Astro builds (e.g. drivers for other devices, tests) may be put in if (!filter_out_of_astro) blocks. TODO(45680): remove this hack.
Current value (from the default): false
From //build/unification/images/BUILD.gn:14
List of prebuilt firmware blobs to include in update packages.
Each entry in the list is a scope defining path and type. A build can only have a single firmware blob of each type.
Note that firmware_prebuilts_path_suffix will be automatically appended to all path variables, so do not include the suffix here.
Current value (from the default): []
From //build/images/args.gni:62
Suffix to append to all firmware_prebuilts paths.
Typically this indicates the hardware revision, and is made available so that users can easily switch revisions using a single arg.
Current value (from the default): ""
From //build/images/args.gni:68
Current value (from the default): "flutter_jit_app"
From //topaz/runtime/dart/dart_component.gni:12
Enables/Disables flutter driver using ‘--args=flutter_driver_enabled=[true/false]’ in fx set. (Disabled by default) This is effective only on debug builds.
Current value (from the default): false
From //build/testing/flutter_driver.gni:9
Current value (from the default): true
From //topaz/runtime/dart/dart_component.gni:26
Whether experimental space dart mode is enabled for Flutter applications.
Current value (from the default): false
From //topaz/runtime/dart/dart_component.gni:32
Current value (from the default): ["//prebuilt/third_party/fonts/fuchsia.font_catalog.json"]
From //src/fonts/build/font_args.gni:17
Merged contents of .font_pkgs.json files. Populated in fonts.gni.
Current value (from the default): []
From //src/fonts/build/font_args.gni:32
Locations of .font_pkgs.json files, which list the locations of font files within the workspace, as well as safe names that are derived from the fonts' file names and can be used to name Fuchsia packages.
Current value (from the default): ["//prebuilt/third_party/fonts/fuchsia.font_pkgs.json"]
From //src/fonts/build/font_args.gni:22
Directory into which all fonts are checked out from CIPD
Current value (from the default): "//prebuilt/third_party/fonts"
From //src/fonts/build/font_args.gni:12
Consumers of the Fuchsia SDK instantiate templates for various SDK parts at a specific spot within their buildroots. The target name for the specific part is then derived from the part name as specified in the meta.json manifest. Different buildroot instantiate the SDK parts at different locations and then set this variable. GN rules can then prefix this variable name in SDK builds to the name of the SDK part. This flag is meaningless in non-SDK buildroots.
Current value (from the default): ""
From //build/fuchsia/sdk.gni:17
UUID of TAs to include in the Fuchsia build.
Current value (from the default): []
From //build/images/ta.gni:10
The size in bytes of the FVM partition image to create. Normally this is computed to be just large enough to fit the blob and data images. The default value is "", which means to size based on inputs. Specifying a size that is too small will result in build failure.
Current value (from the default): ""
From //build/images/fvm.gni:12
The max size of the disk where the FVM is written. This is used for preallocating metadata to determine how much the FVM can expand on disk. Only applies to sparse FVM images. At sparse image construction time, the build fails if the inputs are larger than fvm_max_disk_size. At paving time, the FVM will be sized to the target's disk size up to fvm_max_disk_size. If the size of the disk increases after initial paving, the FVM will resize up to fvm_max_disk_size. During paving, if the target FVM has declared a smaller size than fvm_max_disk_size, the FVM is reinitialized to the larger size. The default value is "" which sets the max disk size to the size of the disk at pave/format time.
Current value (from the default): ""
From //build/images/fvm.gni:25
The size of the FVM partition images “slice size”. The FVM slice size is a minimum size of a particular chunk of a partition that is stored within FVM. A very small slice size may lead to decreased throughput. A very large slice size may lead to wasted space. The selected default size of 8mb is selected for conservation of space, rather than performance.
Current value (from the default): "8388608"
From //build/images/fvm.gni:32
Current value (from the default): "//third_party/glm"
From //src/graphics/lib/magma/gnbuild/magma.gni:17
go_vet_enabled [bool] if false, go vet invocations are disabled for all builds.
Current value (from the default): false
From //build/go/go_build.gni:21
gocache_dir Directory GOCACHE environment variable will be set to. This directory will have build and test results cached, and is safe to be written to concurrently. If overridden, this directory must be a full path.
Current value (from the default): "/b/s/w/ir/k/root_build_dir/fidling/.gocache"
From //build/go/go_build.gni:17
Directory containing the Goma source code. This can be a GN source-absolute path (“//...”) or a system absolute path.
Current value (from the default): "//prebuilt/third_party/goma/linux-x64"
From //build/toolchain/goma.gni:15
Set to true in your args.gn file to generate pre-processed and auto-formatted shaders under the “debug” sub-directory of HotSort and Spinel target generation output directories.
These are never used, but can be reviewed manually to verify the impact of configuration parameters, or when modifying a compute shader.
Example results:
out/default/ gen/src/graphics/lib/compute/ hotsort/targets/hs_amd_gcn3_u64/ comp/ hs_transpose.comp -> unpreprocessed shader debug/ hs_transpose.glsl -> preprocessed shader
Current value (from the default): true
From //src/graphics/lib/compute/gn/glsl_shader_rules.gni:28
At times we may want to compare the performance of unoptimized vs. optimized shaders. On desktop platforms, use of spirv-opt doesn't appear to provide major performance improvements but it significantly reduces the size of the SPIR-V modules.
Disabling the spirv-opt pass may also be useful in identifying and attributing code generation bugs.
Current value (from the default): true
From //src/graphics/lib/compute/gn/glsl_shader_rules.gni:38
The glslangValidator compiler is noisy by default. A cleanly compiling shader still prints out its filename.
This negatively impacts the GN build.
For this reason, we silence the compiler with the “-s” option but unfortunately this also disables all error reporting.
Set to true to see detailed error reporting.
Current value (from the default): false
From //src/graphics/lib/compute/gn/glsl_shader_rules.gni:50
Current value (from the default): "undefined"
From //build/config/host_byteorder.gni:7
Current value (from the default): "x64"
Current value (from the default): "linux"
This is the directory where host tools intended for manual use by developers get installed. It‘s something a developer might put into their shell’s $PATH. Host tools that are just needed as part of the build do not get copied here. This directory is only for things that are generally useful for testing or debugging or whatnot outside of the GN build itself. These are only installed by an explicit install_host_tools() rule (see //build/host.gni).
Current value (from the default): "//root_build_dir/host-tools"
From //build/host.gni:13
Tells icu to load an external data file rather than rely on the icudata being linked directly into the binary.
Current value (from the default): true
From //third_party/icu/config.gni:8
If true, /config/devmgr config will be included into a vbmeta image instead of bootfs.
Current value (from the default): false
From //build/images/vbmeta.gni:14
Include fvm.blob.sparse.blk image into the build if set to true
Current value (from the default): false
From //build/images/args.gni:121
Set to true to include internal fonts in the build.
Current value (from the default): false
From //src/fonts/build/font_args.gni:7
Whether to include tests that are known to fail on NUC with ASan. Should be set to false in the infra builders that have board == “x64” and “asan” in variants.
Current value (from the default): true
From //build/testing/environments.gni:11
Normally these tests are not built and run because they require large amounts of optional data be downloaded. Set this to true to enable the build for the zxdb_large_tests. See symbols/test_data/README.md for how to download the data required for this test.
Current value (from the default): false
From //src/developer/debug/zxdb/BUILD.gn:13
Tells inet to support additionally support async dns sockets.
Current value (from the default): true
From //third_party/openweave-core/config.gni:17
Tells inet to include support for the corresponding protocol.
Current value (from the default): true
From //third_party/openweave-core/config.gni:10
Current value (from the default): true
From //third_party/openweave-core/config.gni:11
Current value (from the default): true
From //third_party/openweave-core/config.gni:12
Current value (from the default): false
From //third_party/openweave-core/config.gni:14
Current value (from the default): true
From //third_party/openweave-core/config.gni:13
Debug build.
Current value (from the default): true
From //build/config/BUILDCONFIG.gn:25
List of kernel command line arguments to bake into the boot image. See also kernel_cmdline and devmgr_config.
Current value for target_cpu = "arm64": ["console.shell=true", "kernel.enable-debugging-syscalls=true", "kernel.enable-serial-syscalls=true", "netsvc.all-features=true", "netsvc.disable=false", "kernel.oom.behavior=reboot"]
From //products/core.gni:17
Overridden from the default: []
From //build/images/args.gni:23
Current value for target_cpu = "x64": ["console.shell=true", "kernel.enable-debugging-syscalls=true", "kernel.enable-serial-syscalls=true", "netsvc.all-features=true", "netsvc.disable=false", "kernel.oom.behavior=reboot"]
From //products/core.gni:17
Overridden from the default: []
From //build/images/args.gni:23
Files containing additional kernel command line arguments to bake into the boot image. The contents of these files (in order) come after any arguments directly in kernel_cmdline_args. These can be GN // source pathnames or absolute system pathnames.
Current value (from the default): []
From //build/images/args.gni:29
List of variants that will form the basis for variant toolchains. To make use of a variant, set select_variant.
Normally this is not set as a build argument, but it serves to document the available set of variants. See also universal_variants. Only set this to remove all the default variants here. To add more, set extra_variants instead.
Each element of the list is one variant, which is a scope defining:
configs (optional) [list of labels] Each label names a config that will be automatically used by every target built in this variant. For each config ${label}, there must also be a target ${label}_deps, which each target built in this variant will automatically depend on. The variant() template is the recommended way to define a config and its _deps target at the same time.
remove_common_configs (optional) remove_shared_configs (optional) [list of labels] This list will be removed (with -=) from the default_common_binary_configs list (or the default_shared_library_configs list, respectively) after all other defaults (and this variant's configs) have been added.
deps (optional) [list of labels] Added to the deps of every target linked in this variant (as well as the automatic ${label}_deps for each label in configs).
name (required if configs is omitted) [string] Name of the variant as used in select_variant elements' variant fields. It's a good idea to make it something concise and meaningful when seen as e.g. part of a directory name under $root_build_dir. If name is omitted, configs must be nonempty and the simple names (not the full label, just the part after all /s and :s) of these configs will be used in toolchain names (each prefixed by a “-”), so the list of config names forming each variant must be unique among the lists in known_variants + extra_variants.
toolchain_args (optional) [scope] Each variable defined in this scope overrides a build argument in the toolchain context of this variant.
host_only (optional) target_only (optional) [scope] This scope can contain any of the fields above. These values are used only for host or target, respectively. Any fields included here should not also be in the outer scope.
Current value (from the default):
[{
configs = ["//build/config/lto"]
}, {
configs = ["//build/config/lto:thinlto"]
}, {
configs = ["//build/config/profile"]
instrumented = true
}, {
configs = ["//build/config/scudo"]
}, {
configs = ["//build/config/sanitizers:ubsan"]
instrumented = true
}, {
configs = ["//build/config/sanitizers:ubsan", "//build/config/sanitizers:sancov"]
instrumented = true
}, {
configs = ["//build/config/sanitizers:asan"]
host_only = {
remove_shared_configs = ["//build/config:symbol_no_undefined"]
}
instrumented = true
toolchain_args = {
use_scudo = false
}
}, {
configs = ["//build/config/sanitizers:asan", "//build/config/sanitizers:ubsan"]
host_only = {
remove_shared_configs = ["//build/config:symbol_no_undefined"]
}
instrumented = true
toolchain_args = {
use_scudo = false
}
}, {
configs = ["//build/config/sanitizers:asan", "//build/config/sanitizers:sancov"]
host_only = {
remove_shared_configs = ["//build/config:symbol_no_undefined"]
}
instrumented = true
toolchain_args = {
use_scudo = false
}
}, {
configs = ["//build/config/sanitizers:asan"]
host_only = {
remove_shared_configs = ["//build/config:symbol_no_undefined"]
}
instrumented = true
name = "asan_no_detect_leaks"
toolchain_args = {
asan_default_options = "detect_leaks=0"
use_scudo = false
}
}, {
configs = ["//build/config/sanitizers:asan", "//build/config/sanitizers:rust-asan", "//build/config/sanitizers:fuzzer", "//build/config/fuchsia:icf"]
host_only = {
remove_shared_configs = ["//build/config:symbol_no_undefined"]
}
instrumented = true
name = "asan-fuzzer"
remove_common_configs = ["//build/config/fuchsia:icf"]
remove_shared_configs = ["//build/config:symbol_no_undefined"]
toolchain_args = {
asan_default_options = "alloc_dealloc_mismatch=0:check_malloc_usable_size=0:detect_odr_violation=0:max_uar_stack_size_log=16:print_scariness=1:allocator_may_return_null=1:detect_leaks=0:malloc_context_size=128:print_summary=1:print_suppressions=0:strict_memcmp=0:symbolize=0:clear_shadow_mmap_threshold=0"
use_scudo = false
}
}, {
configs = ["//build/config/sanitizers:ubsan", "//build/config/sanitizers:fuzzer", "//build/config/fuchsia:icf"]
instrumented = true
name = "ubsan-fuzzer"
remove_common_configs = ["//build/config/fuchsia:icf"]
remove_shared_configs = ["//build/config:symbol_no_undefined"]
}]
From //build/config/BUILDCONFIG.gn:579
Indicates whether to include basemgr.cmx in the boot sequence for the product image.
Current value (from the default): true
From //src/modular/build/modular_config/modular_config.gni:11
Current value (from the default): ""
From //src/virtualization/packages/linux_guest/BUILD.gn:12
If true, adds additional testonly content to extras.img, which will be built and mounted inside the container at /mnt/chromeos.
Current value (from the default): false
From //src/virtualization/packages/biscotti_guest/linux_runner/BUILD.gn:25
Current value (from the default): "10.0.0.1"
From //src/virtualization/packages/biscotti_guest/linux_runner/BUILD.gn:20
Default values for the guest network configuration.
These are currently hard-coded to match what is setup in the virtio-net device.
See //src/virtualization/bin/vmm/device/virtio_net.cc for more details.
Current value (from the default): "10.0.0.2"
From //src/virtualization/packages/biscotti_guest/linux_runner/BUILD.gn:19
Current value (from the default): "255.255.255.0"
From //src/virtualization/packages/biscotti_guest/linux_runner/BUILD.gn:21
If true, all block devices that would normally load as READ_WRITE will be loaded as VOLATILE_WRITE. This is useful when working on changes to the linux kernel as crashes and panics can sometimes corrupt the images.
Current value (from the default): false
From //src/virtualization/packages/biscotti_guest/linux_runner/BUILD.gn:30
Used to enable local benchmarking/fine-tuning when running benchmarks in fx shell. Pass --args=local_bench='true' to fx set in order to enable it.
Current value (from the default): false
From //src/developer/fuchsia-criterion/BUILD.gn:14
Current value (from the default): "30000"
From //garnet/bin/log_listener/BUILD.gn:15
Current value (from the default): "//src/graphics/lib/magma"
From //src/graphics/lib/magma/gnbuild/magma.gni:13
Enable this to have the msd include a suite of tests and invoke them automatically when the driver starts.
Current value (from the default): false
From //src/graphics/lib/magma/gnbuild/magma.gni:27
Enable this to include fuchsia tracing capability
Current value (from the default): true
From //src/graphics/lib/magma/gnbuild/magma.gni:23
Current value (from the default): "/b/s/w/ir/k/third_party/mako"
From //src/graphics/lib/magma/gnbuild/magma.gni:20
Maximum allowable contents for the /blob in a release mode build. Zero means no limit. contents_size refers to contents stored within the filesystem (regardless of how they are stored).
Current value (from the default): "0"
From //build/images/filesystem_limits.gni:10
Maximum allowable image_size for /blob in a release mode build. Zero means no limit. image_size refers to the total image size, including both contents and metadata.
Current value (from the default): "0"
From //build/images/filesystem_limits.gni:16
Maximum allowable contents_size for /data in a release mode build. Zero means no limit. contents_size refers to contents stored within the filesystem (regardless of how they are stored).
Current value (from the default): "0"
From //build/images/filesystem_limits.gni:22
Maximum allowable image_size for /data in a release mode build. Zero means no limit. image_size refers to the total image size, including both contents and metadata.
Current value (from the default): "0"
From //build/images/filesystem_limits.gni:28
Maximum allowable size for fuchsia.zbi
Current value for target_cpu = "arm64": "16777216"
From //boards/arm64.gni:20
Overridden from the default: "0"
From //build/images/filesystem_limits.gni:31
Current value for target_cpu = "x64": "16777216"
From //boards/x64.gni:21
Overridden from the default: "0"
From //build/images/filesystem_limits.gni:31
Maximum allowable size for the FVM in a release mode build Zero means no limit
Current value (from the default): "0"
From //build/images/max_fvm_size.gni:8
Controls how many bytes of space on disk are used to persist device logs. Should be a string value that only contains digits.
Current value (from the default): "0"
From //garnet/bin/log_listener/BUILD.gn:14
Maximum allowable size for zedboot.zbi
Current value for target_cpu = "arm64": "16777216"
From //boards/arm64.gni:21
Overridden from the default: "0"
From //build/images/filesystem_limits.gni:34
Current value for target_cpu = "x64": "16777216"
From //boards/x64.gni:22
Overridden from the default: "0"
From //build/images/filesystem_limits.gni:34
A list of labels for meta packages to be included in the monolith.
Current value for target_cpu = "arm64": ["//build/images:config-data", "//build/images:shell-commands", "//src/sys/component_index:component_index"]
From //products/core.gni:19
Overridden from the default: []
From //build/images/args.gni:80
Current value for target_cpu = "x64": ["//build/images:config-data", "//build/images:shell-commands", "//src/sys/component_index:component_index"]
From //products/core.gni:19
Overridden from the default: []
From //build/images/args.gni:80
Current value (from the default): ""
From //build/images/fvm.gni:67
Current value (from the default): ""
From //build/images/fvm.gni:53
Current value (from the default): ""
From //build/images/fvm.gni:42
Enable all 8 cores, which is faster but emits more heat.
Current value (from the default): true
From //src/graphics/drivers/msd-arm-mali/src/BUILD.gn:9
With this flag set the system tries to use cache coherent memory if the GPU supports it.
Current value (from the default): true
From //src/graphics/drivers/msd-arm-mali/src/BUILD.gn:13
In protected mode, faults don‘t return as much information so they’re much harder to debug. To work around that, add a mode where protected atoms are executed in non-protected mode and vice-versa.
NOTE: The memory security ranges should also be set (in TrustZone) to the opposite of normal, so that non-protected mode accesses can only access protected memory and vice versa. Also, growable memory faults won't work in this mode, so larger portions of growable memory should precommitted (which is not done by default).
Current value (from the default): false
From //src/graphics/drivers/msd-arm-mali/src/BUILD.gn:23
Current value (from the default): "//src/graphics/drivers"
From //src/graphics/lib/magma/gnbuild/magma.gni:15
Current value (from the default): "//src/graphics/drivers/msd-intel-gen"
From //src/graphics/lib/magma/gnbuild/magma.gni:16
Current value (from the default): true
From //src/connectivity/network/netcfg/BUILD.gn:12
Current value (from the default): []
From //zircon/system/core/netsvc/BUILD.gn:19
Default app id will always return no update.
Current value (from the default): "fuchsia-test:no-update"
From //src/sys/pkg/bin/omaha-client/BUILD.gn:14
Use this flag to include previously excluded artifacts on products based on Astro. Yes, our image building system is so broken that this is currently the only way to accommodate the configurations we run on our infrastructure.
Current value for target_cpu = "arm64": false
From //products/core.gni:9
Overridden from the default: false
From //build/unification/images/BUILD.gn:20
Current value for target_cpu = "x64": false
From //products/core.gni:9
Overridden from the default: false
From //build/unification/images/BUILD.gn:20
Current value (from the default): "none"
From //build/config/compiler.gni:32
Sets if we should output breakpad symbols for Fuchsia binaries.
Current value (from the default): false
From //build/config/BUILDCONFIG.gn:28
Current value (from the default): false
From //build/persist_logs.gni:13
Current value (from the default): "//src/security/policy/pkgfs_non_static_pkgs_allowlist_eng.txt"
From //build/images/args.gni:118
Current value (from the default): false
From //build/images/args.gni:92
Directory containing prebuilt Dart SDK. This must have in its bin/ subdirectory gen_snapshot.OS-CPU binaries. Set to empty for a local build.
Current value (from the default): "//prebuilt/third_party/dart/linux-x64"
From //build/dart/dart.gni:9
Current value (from the default): ""
From //src/graphics/lib/magma/gnbuild/magma.gni:29
Current value (from the default): "//prebuilt/third_party/libvulkan_goldfish/arm64/libvulkan_goldfish.so"
From //src/graphics/lib/goldfish-vulkan/gnbuild/BUILD.gn:9
The path to a prebuilt libvulkan.so for an IMG GPU.
Current value (from the default): ""
From //src/graphics/lib/magma/gnbuild/magma.gni:32
Whether or not prototype account transfer is enabled. NOTE: This is not secure and should NOT be enabled for any products! This is only for use during local development.
Current value (from the default): false
From //src/identity/bin/account_manager/BUILD.gn:12
UUID of TAs to include in the Recovery build.
Current value (from the default): []
From //build/images/ta.gni:16
Sets the maximum lint level. “deny” will make all warnings into errors, “warn” preserves them as warnings, and “allow” will ignore warnings.
Current value (from the default): "deny"
From //build/rust/config.gni:40
Sets the default LTO type for rustc bulids.
Current value (from the default): ""
From //build/rust/config.gni:27
Overrides the LTO setting for all Rust builds, regardless of debug/release flags or the with_lto arg to the rustc_ templates. Valid values are “none”, “thin”, and “fat”.
Current value (from the default): ""
From //build/rust/config.gni:50
Overrides the optimization level for all Rust builds, regardless of debug/release flags or the force_opt arg to the rustc_ templates. Valid values are 0-3, o, and z.
Current value (from the default): ""
From //build/rust/config.gni:45
DEPRECATED: Sets the panic type for Rust on fuchsia. Valid values are “unwind” and “abort”. This arg will be removed soon, and we will always use “abort”.
Current value (from the default): "abort"
From //build/rust/config.gni:32
Sets a custom base directory for where rust tooling looks for the standard library
Current value (from the default): "../prebuilt/third_party/rust/linux-x64"
From //build/rust/config.gni:24
Sets the fuchsia toolchain target triple suffix (after arch)
Current value (from the default): "fuchsia"
From //build/rust/config.gni:35
Sets a custom base directory for rustc and cargo. This can be used to test custom Rust toolchains.
Current value (from the default): "../prebuilt/third_party/rust/linux-x64/bin"
From //build/rust/config.gni:20
Draws the current frame number in the top-left corner.
Current value (from the default): false
From //src/ui/scenic/lib/gfx/BUILD.gn:11
Include the vulkan validation layers in scenic.
Current value (from the default): true
From //src/ui/scenic/BUILD.gn:114
Current value (from the default): false
From //src/ui/scenic/lib/gfx/BUILD.gn:8
Default Scudo options (before the SCUDO_OPTIONS environment variable is read at runtime). NOTE: This affects only components using the scudo variant (see GN build argument select_variant), and does not affect anything when the use_scudo build flag is set instead.
Current value (from the default): ["abort_on_error=1", "QuarantineSizeKb=0", "ThreadLocalQuarantineSizeKb=0", "DeallocationTypeMismatch=false", "DeleteSizeMismatch=false", "allocator_may_return_null=true"]
From //build/config/scudo/scudo.gni:17
The directories to search for parts of the SDK.
By default, we search the public directories for the various layers. In the future, we'll search a pre-built SDK as well.
Current value (from the default): ["//garnet/public", "//topaz/public"]
From //build/config/fuchsia/sdk.gni:10
Identifier for the Core SDK.
Current value (from the default): ""
From //sdk/config.gni:7
List of “selectors” to request variant builds of certain targets. Each selector specifies matching criteria and a chosen variant. The first selector in the list to match a given target determines which variant is used for that target.
Each selector is either a string or a scope. A shortcut selector is a string; it gets expanded to a full selector. A full selector is a scope, described below.
A string selector can match a name in select_variant_shortcuts. If it‘s not a specific shortcut listed there, then it can be the name of any variant described in known_variants and universal_variants (and combinations thereof). A selector that’s a simple variant name selects for every binary built in the target toolchain: { host=false variant=selector }.
If a string selector contains a slash, then it‘s "shortcut/filename" and selects only the binary in the target toolchain whose output_name matches "filename", i.e. it adds output_name=["filename"] to each selector scope that the shortcut’s name alone would yield.
The scope that forms a full selector defines some of these:
variant (required)
[string or `false`] The variant that applies if this selector
matches. This can be `false` to choose no variant, or a string
that names the variant. See
[`known_variants`](#known_variants) and
[`universal_variants`](#universal_variants).
The rest below are matching criteria. All are optional. The selector matches if and only if all of its criteria match. If none of these is defined, then the selector always matches.
The first selector in the list to match wins and then the rest of the list is ignored. To construct more complex rules, use a blocklist selector with variant=false before a catch-all default variant, or a list of specific variants before a catch-all false variant.
Each “[strings]” criterion is a list of strings, and the criterion is satisfied if any of the strings matches against the candidate string.
host
[boolean] If true, the selector matches in the host toolchain.
If false, the selector matches in the target toolchain.
testonly
[boolean] If true, the selector matches targets with testonly=true.
If false, the selector matches in targets without testonly=true.
target_type
[strings]: `"executable"`, `"loadable_module"`, or `"driver_module"`
output_name
[strings]: target's `output_name` (default: its `target name`)
label
[strings]: target's full label with `:` (without toolchain suffix)
name
[strings]: target's simple name (label after last `/` or `:`)
dir
[strings]: target's label directory (`//dir` for `//dir:name`).
Current value (from the default): []
From //build/config/BUILDCONFIG.gn:867
This should never be set as a build argument. It exists only to be set in toolchain_args. See //build/toolchain/clang_toolchain.gni for details.
Current value (from the default): []
From //build/config/BUILDCONFIG.gn:872
List of short names for commonly-used variant selectors. Normally this is not set as a build argument, but it serves to document the available set of short-cut names for variant selectors. Each element of this list is a scope where .name is the short name and .select_variant is a a list that can be spliced into select_variant.
Current value (from the default):
[{
name = "host_asan"
select_variant = [{
dir = ["//third_party/yasm", "//third_party/vboot_reference", "//tools/vboot_reference", "//src/fonts/font_info"]
host = true
variant = "asan_no_detect_leaks"
}, {
host = true
variant = "asan"
}]
}, {
name = "kasan"
select_variant = []
}]
From //build/config/BUILDCONFIG.gn:700
Current value (from the default): false
From //build/images/args.gni:90
The input to the size checker. The build system will produce a JSON file to be consumed by the size checker, which will check and prevent integration of subsystems that are over their space allocation. The input consists of the following keys:
asset_ext(string array): a list of extensions that should be considered as assets.
asset_limit(number): maximum size (in bytes) allocated for the assets.
core_limit(number): maximum size (in bytes) allocated for the core system and/or services. This is sort of a “catch all” component that consists of all the area / packages that weren't specified in the components list below.
components(object array): a list of component objects. Each object should contain the following keys:
component(string): name of the component.
src(string array): path of the area / package to be included as part of the component. The path should be relative to the obj/ in the output directory. For example, consider two packages foo and far, built to out/.../obj/some_big_component/foo and out/.../obj/some_big_component/bar. If you want to impose a limit on foo, your src will be [“some_big_component/foo”]. If you want to impose a limit on both foo and far, your src will be [“some_big_component”]. If a package has config-data, those prebuilt blobs actually live under the config-data package. If you wish to impose a limit of those data as well, you should add “build/images/config-data/$for_pkg” to your src. The $for_pkg corresponds to the $for_pkg field in config.gni.
limit(number): maximum size (in bytes) allocated for the component.
Example: size_checker_input = { asset_ext = [ “.ttf” ] asset_limit = 10240 core_limit = 10240 components = [ { component = “Foo” src = [ “topaz/runtime/foo_runner” ] limit = 10240 }, { component = “Bar” src = [ “build/images” ] limit = 20480 }, ] }
Current value (from the default): { }
From //tools/size_checker/cmd/BUILD.gn:52
How many symbols to include in the build. This affects the performance of the build since the symbols are large and dealing with them is slow. 2 means regular build with symbols. 1 means minimal symbols, usually enough for backtraces only. Symbols with internal linkage (static functions or those in anonymous namespaces) may not appear when using this level. 0 means no symbols.
Current value (from the default): 2
From //build/config/compiler.gni:21
Used by syz-ci to build with own syz-executor source.
Current value (from the default): "//third_party/syzkaller"
From //src/testing/fuzzing/syzkaller/BUILD.gn:9
File name suffix of TA images deployed on bootfs. Usually it is “.ta”. The TA image file names are “$ta_uuid$ta_dest_suffix”.
Current value (from the default): ""
From //build/images/ta.gni:24
Source absolute path to the prebuilt TA images.
Current value (from the default): ""
From //build/images/ta.gni:7
File name suffix of prebuilt TA images. “.ta.prod” and “.ta.dev” are usually used. The TA image file names are “$ta_uuid$ta_src_suffix”.
Current value (from the default): ""
From //build/images/ta.gni:20
Current value for target_cpu = "arm64": "arm64"
From //boards/arm64.gni:5
Overridden from the default: ""
Current value for target_cpu = "x64": "x64"
From //boards/x64.gni:5
Overridden from the default: ""
Current value (from the default): ""
The absolute path of the sysroot that is used with the target toolchain.
Current value (from the default): ""
From //build/config/sysroot.gni:7
The termina disk image.
Defaults to the disk image from CIPD, but can be overridden to use a custom disk for development purposes.
Current value (from the default): "//prebuilt/virtualization/packages/termina_guest/images/arm64/vm_rootfs.img"
From //src/virtualization/packages/termina_guest/BUILD.gn:18
The termina kernel image.
Defaults to the common linux kernel image from CIPD, but can be overridden to use a custom kernel for development purposes.
Current value (from the default): "//prebuilt/virtualization/packages/linux_guest/images/arm64/Image"
From //src/virtualization/packages/termina_guest/BUILD.gn:12
A file in integration containing historical test duration data for this build configuration. This file is used by infra to efficiently schedule tests. “default.json” is a dummy file that contains no real duration data, and causes infra to schedule tests as if each one has the same duration.
Current value (from the default): "//integration/infra/test_durations/default.json"
From //BUILD.gn:35
ThinLTO cache directory path.
Current value (from the default): "dartlang/thinlto-cache"
From //build/config/lto/config.gni:16
Number of parallel ThinLTO jobs.
Current value (from the default): 8
From //build/config/lto/config.gni:13
This should never be set as a build argument. It exists only to be set in toolchain_args. See //build/toolchain/clang_toolchain.gni for details. This variable is a scope giving details about the current toolchain: toolchain_variant.base [label] The “base” toolchain for this variant, often the right thing to use in comparisons, not current_toolchain. This is the toolchain actually referenced directly in GN source code. If the current toolchain is not shlib_toolchain or a variant toolchain, this is the same as current_toolchain. In one of those derivative toolchains, this is the toolchain the GN code probably thought it was in. This is the right thing to use in a test like toolchain_variant.base == target_toolchain, rather rather than comparing against current_toolchain. toolchain_variant.name [string] The name of this variant, as used in variant fields in select_variant clauses. In the base toolchain and its shlib_toolchain, this is "". toolchain_variant.suffix [string] This is “-${toolchain_variant.name}”, "" if name is empty. toolchain_variant.is_pic_default [bool] This is true in shlib_toolchain. The other fields are the variant's effects as defined in known_variants.
Current value (from the default):
{
base = "//build/toolchain/fuchsia:arm64"
}
From //build/config/BUILDCONFIG.gn:99
Default UndefinedBehaviorSanitizer options (before the UBSAN_OPTIONS environment variable is read at runtime). This can be set as a build argument to affect most “ubsan” variants in known_variants (which see), or overridden in toolchain_args in one of those variants. Note that setting this nonempty may conflict with programs that define their own __ubsan_default_options C function.
Current value (from the default): "print_stacktrace=1:halt_on_error=1"
From //build/config/sanitizers/BUILD.gn:30
Current value (from the default):
[{
configs = []
name = "release"
toolchain_args = {
is_debug = false
}
}]
From //build/config/BUILDCONFIG.gn:674
If you add package labels to this variable, the packages will be included in the ‘universe’ package set, which represents all software that is produced that is to be published to a package repository or to the SDK by the build. The build system ensures that the universe package set includes the base and cache package sets, which means you do not need to redundantly include those labels in this variable.
Current value for target_cpu = "arm64": ["//tools/net/dev_finder:host", "//tools/vboot_reference:cgpt_host", "//tools/vboot_reference:futility_host", "//bundles:tools"]
From //products/core.gni:98
Overridden from the default: []
From //BUILD.gn:43
Current value for target_cpu = "x64": ["//tools/net/dev_finder:host", "//tools/vboot_reference:cgpt_host", "//tools/vboot_reference:futility_host", "//bundles:tools"]
From //products/core.gni:98
Overridden from the default: []
From //BUILD.gn:43
To ensure that everything can be built without debug symbols present we gate weather or not these are consumed on a build argument. When set, unpack_debug_archives creates an additional build step that unpacks debug archives in tar.bzip2 format into the .build-id directory
Current value (from the default): false
From //build/packages/prebuilt_package.gni:13
(deprecated) List of kernel images to include in the update (OTA) package. If no list is provided, all built kernels are included. The names in the list are strings that must match the filename to be included in the update package.
Current value (from the default): []
From //build/images/args.gni:41
If true then the most recent canary version of the Cast Runner is used, otherwise the most recently validated version is used.
Current value (from the default): false
From //src/cast/BUILD.gn:11
Set to true to enable compiling with ccache
Current value (from the default): false
From //build/toolchain/ccache.gni:9
Set to use the most recent canary version of prebuilt Chromium components otherwise the most recently validated version is used.
Current value (from the default): false
From //src/chromium/BUILD.gn:13
Set to true to enable distributed compilation using Goma.
Current value (from the default): false
From //build/toolchain/goma.gni:11
Use link time optimization (LTO).
Current value (from the default): false
From //build/config/lto/config.gni:7
Current value (from the default): false
From //src/connectivity/network/BUILD.gn:6
Whether to use the NNBD fork of the SDK core libraries. TODO(#38701): Remove this when the fork has been merged back in.
Current value (from the default): false
From //third_party/dart/sdk_args.gni:10
Whether to use the prebuilt Dart SDK for everything. When setting this to false, the preubilt Dart SDK will not be used in situations where the version of the SDK matters, but may still be used as an optimization where the version does not matter.
Current value (from the default): true
From //build/dart/dart.gni:15
Use a prebuilt ffmpeg binary rather than building it locally. See //src/media/lib/ffmpeg/README.md for details. This is ignored when building in variant builds for which there is no prebuilt. In that case, ffmpeg is always built from source so as to be built with the selected variant's config. When this is false (either explicitly or in a variant build) then //third_party/ffmpeg must be in the source tree, which requires: jiri import -name integration third_party/ffmpeg https://fuchsia.googlesource.com/integration
Current value (from the default): true
From //src/media/lib/ffmpeg/BUILD.gn:14
TODO(davemoore): Remove this entire mechanism once standalone scudo is the default (DNO-442) Enable the Scudo memory allocator.
Current value (from the default): false
From //build/config/scudo/scudo.gni:10
Use ThinLTO variant of LTO if use_lto = true.
Current value (from the default): true
From //build/config/lto/config.gni:10
If true, then a vbmeta image will be generated for provided ZBI and the paving script will pave vbmeta images to the target device.
Current value (from the default): false
From //build/images/vbmeta.gni:10
Use vboot images
Current value (from the default): false
From //build/images/args.gni:10
Only set in buildroots where targets configure themselves for use with the Fuchsia SDK
Current value (from the default): false
From //build/fuchsia/sdk.gni:8
List of “selectors” to request variant builds of certain targets. Each selector specifies matching criteria and a chosen variant. The first selector in the list to match a given target determines which variant is used for that target.
The $default_variants list is appended to the list set here. So if no selector set in $variants matches (e.g. if the list is empty, as is the default), then the first match in $default_variants chooses the variant.
Each selector is either a string or a scope. A selector that's a string is a shorthand that gets expanded to a full selector (a scope); the full selector form is described below.
If a string selector contains a slash, then it's “shorthand/filename”. This is like the plain “shorthand” selector, but further constrained to apply only to a binary whose output_name exactly matches “filename”.
The “shorthand” string (a whole string selector or the part before slash) is first looked up in $variant_shorthands, which see. If it doesn‘t match a name defined there, then it must be the name of a variant. In that case, it’s equivalent to { variant = "..." host = false }, meaning it applies to every binary not built to be a host tool.
A full selector is a scope with the following fields. All the fields other than .variant are matching criteria. A selector matches if all of its matching criteria match. Hence, a selector with no criteria defined always matches and is referred to as a “catch-all”. The $default_variants list ends with a catch-all, so each target always chooses some variant.
Selector scope parameters
variant
cpu
os
host
kernel
environment
. if it has one. For example, “host” would match both “host” and “host.fuzz”.target_type
label
get_label_info(..., "label_no_toolchain")) is one in the list.dir
get_label_info(..., "dir")) is one in the list.name
get_label_info(..., "name")) is one in the list.output_name
output_name of the target is one in the list. Note output_name defaults to target_name, and does not include prefixes or suffixes like “.so” or “.exe”.An element with a scope for .variant defines a new variant. Each variant name used in a selector must be defined exactly once. Other selectors can refer to the same variant by using the name string in the .variant field. Definitions in $variants take precedence over the same name defined in $standard_variants, but it would probably cause confusion to use the name of a standard variant with a non-standard definition.
Variant scope parameters
name
[a-z0-9_-] is a good idea).globals
is_gcc = true in $globals. This should be used sparingly and is safest when restricted to variables that $zx/public/gn/BUILDCONFIG.gn sets defaults for.toolchain_args
gn args. Do not define variables in declare_args() just for the purpose of setting them here, i.e. if they should not also be available to set via gn args to affect other variants that don't override them here. Instead, use either $globals (above) or $toolchain_vars (below).toolchain_vars
configs
{add=["..."]}. The string is the GN label (without toolchain) for a config() target. A scope element can be more selective, as described below.shlib
current_toolchain == toolchain.shlib (if true) or current_toolchain != toolchain.shlib (if false). That is, it applies only in (not ni) the companion toolchain used to compile shared_library() and loadable_module() (including driver()) code.types
target_type in a selector, described above).add
remove
configs -= remove so it has the normal GN semantics that it's an error if any element in the $remove list is not present in the $configs list beforehand.implicit_deps
tags
exclude_variant_tags = [ "useronly" ]. Then $variants selectors that choose variants that are incompatible with the kernel are automatically ignored in the kernel toolchains, so there’s no need to add kernel = false to every such selector.bases
name and bases are combined with the fields defined explicitly for the new variant. The fields of list type are just concatenated in order (each $bases variant in the order listed, then this variant). The fields of scope type are merged in the same order, with a variant later in the list overriding values set earlier (so this variant's values override all the bases). There is only one level of inheritance: a base variant listed in $bases cannot have $bases itself.Current value (from the default): []
From //zircon/public/gn/toolchain/variants.gni:222
Current value (from the default): ""
From //build/images/args.gni:86
Current value (from the default): ""
From //build/images/args.gni:87
Current value (from the default): ""
From //build/images/args.gni:88
Whether libraries under //vendor should be linted.
Current value (from the default): false
From //build/fidl/fidl_library.gni:13
Enable verbose logging in virtmagma-related code
Current value (from the default): false
From //src/graphics/lib/magma/include/virtio/virtmagma_debug.gni:7
Current value (from the default): ""
From //src/graphics/examples/vkprimer/BUILD.gn:46
Whether to only warn when an SDK has been modified. If false, any unacknowledged SDK change will cause a build failure.
Current value (from the default): false
From //build/sdk/config.gni:11
Tells openweave to support legacy WDM mode.
Current value (from the default): false
From //third_party/openweave-core/config.gni:29
Tells openweave to build WARM libraries.
Current value (from the default): true
From //third_party/openweave-core/config.gni:26
Tells openweave components to use bsd-like sockets.
Current value (from the default): true
From //third_party/openweave-core/config.gni:7
Tells openweave components to support fault injection.
Current value (from the default): false
From //third_party/openweave-core/config.gni:20
Tells openweave to support Verhoeff checksum.
Current value (from the default): true
From //third_party/openweave-core/config.gni:23
Selects the wlan configuration type to use. Choices: “client” - client mode “ap” - access point mode "" (empty string) - no configuration
Current value (from the default): "client"
From //src/connectivity/wlan/wlancfg/BUILD.gn:16
Compression setting for ZBI “storage” items. This can be either “lz4f” or “zstd”, optionally followed by “.LEVEL” where LEVEL can be an integer or “max”.
Current value (from the default): "zstd"
From //build/config/fuchsia/zbi.gni:11
List of kernel command line arguments to bake into the Zedboot image. See //docs/reference/kernel_cmdline.md and zedboot_devmgr_config.
Current value (from the default): []
From //build/images/zedboot/zedboot_args.gni:9
Files containing additional kernel command line arguments to bake into the Zedboot image. The contents of these files (in order) come after any arguments directly in zedboot_cmdline_args. These can be GN // source pathnames or absolute system pathnames.
Current value (from the default): []
From //build/images/zedboot/zedboot_args.gni:15
List of arguments to populate /boot/config/devmgr in the Zedboot image.
Current value (from the default): []
From //build/images/zedboot/zedboot_args.gni:18
UUID of TAs to include in the Zedboot build.
Current value (from the default): []
From //build/images/ta.gni:13
arguments to fx flash script
Current value (from the default): ""
From //build/images/args.gni:83
Zircon GN build arguments. The default passes through GOMA/ccache settings and select_variant shorthand selectors. Only set this if you want to wipe out all the defaults that propagate from Fuchsia GN to Zircon GN. The default value folds in zircon_extra_args, so usually it's better to just set zircon_extra_args and leave zircon_args alone. Any individual Zircon build argument set in zircon_extra_args will silently clobber the default value shown here.
Current value (from the default):
{
default_deps = ["//:legacy-arm64", "//:legacy_host_targets-linux-x64", "//:legacy_unification-arm64", "//tools:all-hosts"]
goma_dir = "/b/s/w/ir/k/prebuilt/third_party/goma/linux-x64"
use_ccache = false
use_goma = false
variants = []
zbi_compression = "zstd"
}
From //BUILD.gn:93
Current value (from the default): true
From //build/config/fuchsia/BUILD.gn:218
Current value (from the default): ""
From //build/images/args.gni:84
Current value (from the default): "//zircon"
From //src/graphics/lib/magma/gnbuild/magma.gni:18
Compilation database filter. Gets passed to --export-compile-commands=.
Current value (from the default): "legacy-arm64"
From //BUILD.gn:67
Zircon GN build arguments. This is included in the default value of zircon_args so you can set this to add things there without wiping out the defaults. When you set zircon_args directly, then this has no effect at all. Arguments you set here override any arguments in the default zircon_args. There is no way to append to a value from the defaults. Note that for just setting simple (string-only) values in Zircon GN‘s variants, the default zircon_args uses a variants value derived from select_variant so for simple cases there is no need to explicitly set Zircon’s variants here.
Current value (from the default): { }
From //BUILD.gn:56
Additional Zircon GN labels to include in the Zircon build.
Current value (from the default): []
From //BUILD.gn:60
Current value (from the default): ""
From //build/images/args.gni:85
Where to emit a tracelog from Zircon's GN run. No trace will be produced if given the empty string. Path can be source-absolute or system-absolute.
Current value (from the default): ""
From //BUILD.gn:64
Partition name from where image will be verified
Current value (from the default): "zircon"
From //build/images/vbmeta.gni:32
This argument specifies from where the system should obtain the zxcrypt master key to the system data partition.
This value be reified as /boot/config/zxcrypt in both the zircon boot image and the zedboot boot image, for consumption by fshost and the paver, respectively.
Acceptable values are:
In the future, we may consider adding support for TPMs, or additional logic to explicitly support other fallback behavior.
Current value (from the default): "null"
From //build/images/zxcrypt.gni:29
target_cpu = "arm64"Path to the amlogic decoder firmware file. Overrides the default in the build.
Current value (from the default): ""
From //src/media/drivers/amlogic_decoder/BUILD.gn:12
The ARM floating point mode. This is either the string “hard”, “soft”, or “softfp”. An empty string means to use the default one for the arm_version.
Current value (from the default): ""
From //build/config/arm.gni:20
Whether to enable optional NEON code paths.
Current value (from the default): false
From //build/config/arm.gni:31
The ARM variant-specific tuning mode. This will be a string like “armv6” or “cortex-a15”. An empty string means to use the default for the arm_version.
Current value (from the default): ""
From //build/config/arm.gni:25
Whether to use the neon FPU instruction set or not.
Current value (from the default): true
From //build/config/arm.gni:28
Current value (from the default): 8
From //build/config/arm.gni:12
target_cpu = "x64"Enable debug output in the ACPI library (used by the ACPI bus driver).
Current value (from the default): false
From //third_party/acpica/BUILD.gn:9
Setting this config to true only makes sense if the zircon enable_user_pci config is also true. We define a separate config here for the moment due to not quite unified builds and the difficulty of sharing configs between builds.
Current value (from the default): false
From //src/devices/board/drivers/x86/BUILD.gn:15