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# Copyright 2016 the V8 project authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import("//build/config/jumbo.gni")
import("//build/config/sanitizers/sanitizers.gni")
import("//build/config/v8_target_cpu.gni")
import("//build/split_static_library.gni")
declare_args() {
# Set flags for tracking code coverage. Uses gcov with gcc and sanitizer
# coverage with clang.
v8_code_coverage = false
# Includes files needed for correctness fuzzing.
v8_correctness_fuzzer = false
# Adds additional compile target for building multiple architectures at once.
v8_multi_arch_build = false
# Indicate if valgrind was fetched as a custom deps to make it available on
# swarming.
v8_has_valgrind = false
# Indicate if gcmole was fetched as a hook to make it available on swarming.
v8_gcmole = false
# Turns on compiler optimizations in V8 in Debug build.
v8_optimized_debug = true
# Support for backtrace_symbols on linux.
v8_enable_backtrace = ""
# Enables raw heap snapshots containing internals. Used for debugging memory
# on platform and embedder level.
v8_enable_raw_heap_snapshots = false
# Enable several snapshots side-by-side (e.g. default and for trusted code).
v8_use_multi_snapshots = false
# Use external files for startup data blobs:
# the JS builtins sources and the start snapshot.
v8_use_external_startup_data = ""
# Enable ECMAScript Internationalization API. Enabling this feature will
# add a dependency on the ICU library.
v8_enable_i18n_support = true
# Use static libraries instead of source_sets.
v8_static_library = false
# Enable monolithic static library for embedders.
v8_monolithic = false
# Expose symbols for dynamic linking.
v8_expose_symbols = false
# Use Perfetto (https://perfetto.dev) as the default TracingController. Not
# currently implemented.
v8_use_perfetto = false
}
if (v8_use_external_startup_data == "") {
# If not specified as a gn arg, use external startup data by default if
# we're not on ios.
v8_use_external_startup_data = !is_ios
}
if (v8_use_multi_snapshots) {
# Silently disable multi snapshots if they're incompatible with the current
# build configuration. This allows us to set v8_use_multi_snapshots=true on
# all bots, and e.g. no-snapshot bots will automatically do the right thing.
v8_use_multi_snapshots =
v8_use_external_startup_data && !build_with_chromium && !use_jumbo_build
}
if (v8_enable_backtrace == "") {
v8_enable_backtrace = is_debug && !v8_optimized_debug
}
# Points to // in v8 stand-alone or to //v8/ in chromium. We need absolute
# paths for all configs in templates as they are shared in different
# subdirectories.
v8_path_prefix = get_path_info("../", "abspath")
v8_inspector_js_protocol = v8_path_prefix + "/include/js_protocol.pdl"
###############################################################################
# Templates
#
# Common configs to remove or add in all v8 targets.
v8_remove_configs = []
v8_add_configs = [
v8_path_prefix + ":features",
v8_path_prefix + ":toolchain",
]
if (is_debug && !v8_optimized_debug) {
v8_remove_configs += [ "//build/config/compiler:default_optimization" ]
v8_add_configs += [ "//build/config/compiler:no_optimize" ]
} else {
v8_remove_configs += [ "//build/config/compiler:default_optimization" ]
# TODO(crbug.com/621335) Rework this so that we don't have the confusion
# between "optimize_speed" and "optimize_max".
if (((is_posix && !is_android) || is_fuchsia) && !using_sanitizer) {
v8_add_configs += [ "//build/config/compiler:optimize_speed" ]
} else {
v8_add_configs += [ "//build/config/compiler:optimize_max" ]
}
}
if (v8_code_coverage && !is_clang) {
v8_add_configs += [
v8_path_prefix + ":v8_gcov_coverage_cflags",
v8_path_prefix + ":v8_gcov_coverage_ldflags",
]
}
if ((is_posix || is_fuchsia) &&
(v8_enable_backtrace || v8_monolithic || v8_expose_symbols)) {
v8_remove_configs += [ "//build/config/gcc:symbol_visibility_hidden" ]
v8_add_configs += [ "//build/config/gcc:symbol_visibility_default" ]
}
# On MIPS gcc_target_rpath and ldso_path might be needed for all builds.
if (target_cpu == "mipsel" || target_cpu == "mips64el" ||
target_cpu == "mips" || target_cpu == "mips64") {
v8_add_configs += [ "//build/config/gcc:rpath_for_built_shared_libraries" ]
}
if (!build_with_chromium && is_clang) {
v8_remove_configs += [ "//build/config/clang:find_bad_constructs" ]
}
# All templates should be kept in sync.
template("v8_source_set") {
if (defined(invoker.split_count) && invoker.split_count > 1 &&
defined(v8_static_library) && v8_static_library && is_win) {
link_target_type = "jumbo_split_static_library"
} else if (defined(v8_static_library) && v8_static_library) {
link_target_type = "jumbo_static_library"
} else {
link_target_type = "jumbo_source_set"
}
target(link_target_type, target_name) {
forward_variables_from(invoker,
"*",
[
"configs",
"remove_configs",
])
configs -= v8_remove_configs
configs += v8_add_configs
if (defined(invoker.remove_configs)) {
configs -= invoker.remove_configs
}
configs += invoker.configs
}
}
template("v8_header_set") {
jumbo_source_set(target_name) {
forward_variables_from(invoker, "*", [ "configs" ])
configs -= v8_remove_configs
configs += v8_add_configs
configs += invoker.configs
}
}
template("v8_executable") {
executable(target_name) {
forward_variables_from(invoker,
"*",
[
"configs",
"remove_configs",
])
configs -= v8_remove_configs
configs += v8_add_configs
if (defined(invoker.remove_configs)) {
configs -= invoker.remove_configs
}
configs += invoker.configs
if (is_linux) {
# For enabling ASLR.
ldflags = [ "-pie" ]
}
if (defined(testonly) && testonly && v8_code_coverage) {
# Only add code coverage cflags for non-test files for performance
# reasons.
if (is_clang) {
configs -= [ "//build/config/sanitizers:default_sanitizer_flags" ]
configs +=
[ "//build/config/sanitizers:default_sanitizer_flags_but_coverage" ]
} else {
configs -= [ v8_path_prefix + ":v8_gcov_coverage_cflags" ]
}
}
deps += [ v8_path_prefix + ":v8_dump_build_config" ]
}
}
template("v8_component") {
component(target_name) {
forward_variables_from(invoker,
"*",
[
"configs",
"remove_configs",
])
configs -= v8_remove_configs
configs += v8_add_configs
if (defined(invoker.remove_configs)) {
configs -= invoker.remove_configs
}
configs += invoker.configs
}
}
template("v8_static_library") {
static_library(target_name) {
complete_static_lib = true
forward_variables_from(invoker, "*", [ "configs" ])
configs -= v8_remove_configs
configs -= [ "//build/config/compiler:thin_archive" ]
configs += v8_add_configs
configs += invoker.configs
}
}
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