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# 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/"
# 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/"
# Only instantiate targets in the default toolchain that are dependencies
# of any target defined in //, to significantly reduce the size of the
# GN build graph and of the Ninja build plan.
root_patterns = [
# All targets defined in //
# 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:
exec_script_whitelist = [
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 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_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"
# Pigweed configs for Fuchsia.
pw_function_CONFIG =
# Some Pigweed module implementations need to be link dependencies to avoid circular dependencies.
pw_build_LINK_DEPS = [
# 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/"
# Enable usage of the pw_async Pigweed module.
pw_async_TASK_BACKEND = "//third_party/pigweed/backends/pw_async_fuchsia:task"
# 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_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" ]