.gn - fuchsia - Git at Google

 # Copyright 2016 The Fuchsia Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.

 # This file directs GN to all the other key files.

 # The location of the build configuration file.
 buildconfig = "//build/config/BUILDCONFIG.gn"

 # The secondary source root is a parallel directory tree where GN build files are placed when they
 # can not be placed directly in the source tree, e.g. for third party source trees.
 secondary_source = "//build/secondary/"

 # https://fxbug.dev/363930634: set this to true once all actions in the build have been fixed,
 # of if we decide to create depfile parent directories in Ninja.
 no_stamp_files = true

 # Only instantiate targets in the default toolchain that are dependencies
 # of any target defined in //BUILD.gn, to significantly reduce the size of the
 # GN build graph and of the Ninja build plan.
 root_patterns = [
   # All targets defined in //BUILD.gn
   "//:*",
 ]

 # The executable used to execute scripts in action and exec_script. This is often an interpreter for
 # projects that use a primary scripting language. In this project, we use several different kinds of
 # programs including scripts in different languages and native binaries. An empty script_executable
 # string tells GN to directly run the "script".
 script_executable = ""

 # Require Ninja 1.10.0 to support multiple outputs from a rule with a depfile.
 ninja_required_version = "1.10.0"

 # Enable checking for all source code we control.
 no_check_targets = [ "//third_party/*" ]

 # Use of `exec_script()` is discouraged for performance reasons.
 # See: https://fuchsia.dev/fuchsia-src/development/build/build_system/best_practices_templates#exec-script
 exec_script_whitelist = [
   "//build/config/fuchsia/BUILD.gn",
   "//build/config/fuchsia/platform_version.gni",
   "//build/config/mac/mac_sdk.gni",
   "//build/config/profile/BUILD.gn",
   "//build/config/sanitizers/BUILD.gn",
   "//build/rust/BUILD.gn",
   "//build/toolchain/default_concurrent_jobs.gni",
   "//build/toolchain/zircon/zircon_toolchain.gni",
   "//build/icu/config.gni",
   "//zircon/kernel/arch/x86/phys/BUILD.gn",
 ]

 check_system_includes = true

 # Causes a Clang compilation database to be written to $root_build_dir/compile_commands.json. It
 # will contain the compilation commands for these patterns and all of their recursive dependencies.
 export_compile_commands = [ "//:default" ]

 # These arguments override the default values for items in a declare_args block. "gn args" in turn
 # can override these.
 #
 # In general the value for a build arg in a declare_args block should be the default. In some
 # cases, a third party dependency will want different defaults for being built as part of Fuchsia
 # vs. being built standalone. In this case, the Fuchsia defaults should go here. There should be no
 # overrides here for values declared in the main Fuchsia repository.
 #
 # Important note for defining defaults: This file is executed before the BUILDCONFIG.gn file. That
 # file sets up the global variables like "target_os". This means that the default_args can not depend
 # on the platform, architecture, or other build parameters. If you really need that, the other repo
 # should define a flag that toggles on a behavior that implements the additional logic required by
 # Fuchsia to set the variables.
 default_args = {
   # Specify Pigweed backends for Fuchsia.
   pw_assert_BACKEND = "//third_party/pigweed/backends/pw_assert"
   pw_log_BACKEND = "//third_party/pigweed/backends/pw_log"
   pw_chrono_SYSTEM_CLOCK_BACKEND =
       "//third_party/pigweed/src/pw_chrono_stl:system_clock"
   pw_sync_MUTEX_BACKEND = "//third_party/pigweed/src/pw_sync_stl:mutex_backend"
   pw_sys_io_BACKEND = "//third_party/pigweed/src/pw_sys_io_stdio"
   pw_thread_SLEEP_BACKEND = "//third_party/pigweed/src/pw_thread_stl:sleep"

   pw_sync_THREAD_NOTIFICATION_BACKEND = "//third_party/pigweed/src/pw_sync:binary_semaphore_thread_notification_backend"
   pw_sync_TIMED_THREAD_NOTIFICATION_BACKEND = "//third_party/pigweed/src/pw_sync:binary_semaphore_timed_thread_notification_backend"
   pw_chrono_SYSTEM_TIMER_BACKEND =
       "//third_party/pigweed/src/pw_chrono_stl:system_timer"
   pw_sync_BINARY_SEMAPHORE_BACKEND =
       "//third_party/pigweed/src/pw_sync_stl:binary_semaphore_backend"

   # Pigweed configs for Fuchsia.
   pw_function_CONFIG =
       "//third_party/pigweed/src/pw_function:enable_dynamic_allocation"

   # Some Pigweed module implementations need to be link dependencies to avoid circular dependencies.
   pw_build_LINK_DEPS = [
     "//third_party/pigweed/src/pw_assert:impl",
     "//third_party/pigweed/src/pw_log:impl",
   ]

   # Configures Pigweed to use Fuchsia source directly instead of Pigweed's copy.
   dir_pw_third_party_fuchsia = "//"

   # Configures Pigweed to use Fuchsia's boringssl target.
   pw_third_party_boringssl_ALIAS = "//third_party/boringssl"

   # Configures Pigweed to use Fuchsia's Emboss checkout.
   dir_pw_third_party_emboss = "//third_party/github.com/google/emboss/src"

   # Enable usage of the pw_async Pigweed module.
   pw_async_EXPERIMENTAL_MODULE_VISIBILITY = [
     "//third_party/pigweed/backends/pw_async_fuchsia:*",
     "//third_party/pigweed:*",
     "//src/connectivity/bluetooth/core/bt-host/*",
   ]

   pw_async_TASK_BACKEND = "//third_party/pigweed/backends/pw_async_fuchsia:task"

   pw_async_FAKE_DISPATCHER_BACKEND =
       "//third_party/pigweed/backends/pw_async_fuchsia:fake_dispatcher"

   # Use protoc from the Fuchsia build for Pigweed
   pw_protobuf_compiler_PROTOC_TARGET = "//third_party/protobuf:protoc"
   pw_protobuf_compiler_PROTOC_BINARY = "host_x64/protoc"

   # Settings for pigweed's CHRE module.
   dir_pw_third_party_chre = "//third_party/chre/src"
   pw_chre_CONFIG = "//third_party/chre:chre_config"
   pw_chre_PLATFORM_BACKEND = "//third_party/pigweed/src/pw_chre:chre_backend"
   pw_chre_PLATFORM_BACKEND_HEADERS =
       "//third_party/pigweed/src/pw_chre:chre_backend_headers"

   pw_unit_test_MAIN = "//src/lib/fxl/test:gtest_main"
   pw_unit_test_GOOGLETEST_BACKEND = "//third_party/googletest:gmock_no_testonly"
   pw_unit_test_BACKEND = "//third_party/pigweed/src/pw_unit_test:googletest"
   pw_unit_test_TESTONLY = true

   # Point Pigweed's ICU target to Fuchsia's checkout.
   dir_pw_third_party_icu = "//third_party/icu/default"

   # This is a Pigweed build configuration argument that removes default configs
   # from pw_* targets. Due to linker errors ("undefined symbol: typeinfo") when
   # using source_set with pw_source_set, we need to remove the reduced_size
   # config that adds the "-fno-rtti" flag.
   remove_default_configs = [ "//third_party/pigweed/src/pw_build:reduced_size" ]
 }
	# Copyright 2016 The Fuchsia Authors. All rights reserved.
	# Use of this source code is governed by a BSD-style license that can be
	# found in the LICENSE file.

	# This file directs GN to all the other key files.

	# The location of the build configuration file.
	buildconfig = "//build/config/BUILDCONFIG.gn"

	# The secondary source root is a parallel directory tree where GN build files are placed when they
	# can not be placed directly in the source tree, e.g. for third party source trees.
	secondary_source = "//build/secondary/"

	# https://fxbug.dev/363930634: set this to true once all actions in the build have been fixed,
	# of if we decide to create depfile parent directories in Ninja.
	no_stamp_files = true

	# Only instantiate targets in the default toolchain that are dependencies
	# of any target defined in //BUILD.gn, to significantly reduce the size of the
	# GN build graph and of the Ninja build plan.
	root_patterns = [
	# All targets defined in //BUILD.gn
	"//:*",
	]

	# The executable used to execute scripts in action and exec_script. This is often an interpreter for
	# projects that use a primary scripting language. In this project, we use several different kinds of
	# programs including scripts in different languages and native binaries. An empty script_executable
	# string tells GN to directly run the "script".
	script_executable = ""

	# Require Ninja 1.10.0 to support multiple outputs from a rule with a depfile.
	ninja_required_version = "1.10.0"

	# Enable checking for all source code we control.
	no_check_targets = [ "//third_party/*" ]

	# Use of `exec_script()` is discouraged for performance reasons.
	# See: https://fuchsia.dev/fuchsia-src/development/build/build_system/best_practices_templates#exec-script
	exec_script_whitelist = [
	"//build/config/fuchsia/BUILD.gn",
	"//build/config/fuchsia/platform_version.gni",
	"//build/config/mac/mac_sdk.gni",
	"//build/config/profile/BUILD.gn",
	"//build/config/sanitizers/BUILD.gn",
	"//build/rust/BUILD.gn",
	"//build/toolchain/default_concurrent_jobs.gni",
	"//build/toolchain/zircon/zircon_toolchain.gni",
	"//build/icu/config.gni",
	"//zircon/kernel/arch/x86/phys/BUILD.gn",
	]

	check_system_includes = true

	# Causes a Clang compilation database to be written to $root_build_dir/compile_commands.json. It
	# will contain the compilation commands for these patterns and all of their recursive dependencies.
	export_compile_commands = [ "//:default" ]

	# These arguments override the default values for items in a declare_args block. "gn args" in turn
	# can override these.
	#
	# In general the value for a build arg in a declare_args block should be the default. In some
	# cases, a third party dependency will want different defaults for being built as part of Fuchsia
	# vs. being built standalone. In this case, the Fuchsia defaults should go here. There should be no
	# overrides here for values declared in the main Fuchsia repository.
	#
	# Important note for defining defaults: This file is executed before the BUILDCONFIG.gn file. That
	# file sets up the global variables like "target_os". This means that the default_args can not depend
	# on the platform, architecture, or other build parameters. If you really need that, the other repo
	# should define a flag that toggles on a behavior that implements the additional logic required by
	# Fuchsia to set the variables.
	default_args = {
	# Specify Pigweed backends for Fuchsia.
	pw_assert_BACKEND = "//third_party/pigweed/backends/pw_assert"
	pw_log_BACKEND = "//third_party/pigweed/backends/pw_log"
	pw_chrono_SYSTEM_CLOCK_BACKEND =
	"//third_party/pigweed/src/pw_chrono_stl:system_clock"
	pw_sync_MUTEX_BACKEND = "//third_party/pigweed/src/pw_sync_stl:mutex_backend"
	pw_sys_io_BACKEND = "//third_party/pigweed/src/pw_sys_io_stdio"
	pw_thread_SLEEP_BACKEND = "//third_party/pigweed/src/pw_thread_stl:sleep"

	pw_sync_THREAD_NOTIFICATION_BACKEND = "//third_party/pigweed/src/pw_sync:binary_semaphore_thread_notification_backend"
	pw_sync_TIMED_THREAD_NOTIFICATION_BACKEND = "//third_party/pigweed/src/pw_sync:binary_semaphore_timed_thread_notification_backend"
	pw_chrono_SYSTEM_TIMER_BACKEND =
	"//third_party/pigweed/src/pw_chrono_stl:system_timer"
	pw_sync_BINARY_SEMAPHORE_BACKEND =
	"//third_party/pigweed/src/pw_sync_stl:binary_semaphore_backend"

	# Pigweed configs for Fuchsia.
	pw_function_CONFIG =
	"//third_party/pigweed/src/pw_function:enable_dynamic_allocation"

	# Some Pigweed module implementations need to be link dependencies to avoid circular dependencies.
	pw_build_LINK_DEPS = [
	"//third_party/pigweed/src/pw_assert:impl",
	"//third_party/pigweed/src/pw_log:impl",
	]

	# Configures Pigweed to use Fuchsia source directly instead of Pigweed's copy.
	dir_pw_third_party_fuchsia = "//"

	# Configures Pigweed to use Fuchsia's boringssl target.
	pw_third_party_boringssl_ALIAS = "//third_party/boringssl"

	# Configures Pigweed to use Fuchsia's Emboss checkout.
	dir_pw_third_party_emboss = "//third_party/github.com/google/emboss/src"

	# Enable usage of the pw_async Pigweed module.
	pw_async_EXPERIMENTAL_MODULE_VISIBILITY = [
	"//third_party/pigweed/backends/pw_async_fuchsia:*",
	"//third_party/pigweed:*",
	"//src/connectivity/bluetooth/core/bt-host/*",
	]

	pw_async_TASK_BACKEND = "//third_party/pigweed/backends/pw_async_fuchsia:task"

	pw_async_FAKE_DISPATCHER_BACKEND =
	"//third_party/pigweed/backends/pw_async_fuchsia:fake_dispatcher"

	# Use protoc from the Fuchsia build for Pigweed
	pw_protobuf_compiler_PROTOC_TARGET = "//third_party/protobuf:protoc"
	pw_protobuf_compiler_PROTOC_BINARY = "host_x64/protoc"

	# Settings for pigweed's CHRE module.
	dir_pw_third_party_chre = "//third_party/chre/src"
	pw_chre_CONFIG = "//third_party/chre:chre_config"
	pw_chre_PLATFORM_BACKEND = "//third_party/pigweed/src/pw_chre:chre_backend"
	pw_chre_PLATFORM_BACKEND_HEADERS =
	"//third_party/pigweed/src/pw_chre:chre_backend_headers"

	pw_unit_test_MAIN = "//src/lib/fxl/test:gtest_main"
	pw_unit_test_GOOGLETEST_BACKEND = "//third_party/googletest:gmock_no_testonly"
	pw_unit_test_BACKEND = "//third_party/pigweed/src/pw_unit_test:googletest"
	pw_unit_test_TESTONLY = true

	# Point Pigweed's ICU target to Fuchsia's checkout.
	dir_pw_third_party_icu = "//third_party/icu/default"

	# This is a Pigweed build configuration argument that removes default configs
	# from pw_* targets. Due to linker errors ("undefined symbol: typeinfo") when
	# using source_set with pw_source_set, we need to remove the reduced_size
	# config that adds the "-fno-rtti" flag.
	remove_default_configs = [ "//third_party/pigweed/src/pw_build:reduced_size" ]
	}