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# Copyright 2021 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import("//build/config/rust.gni")
if (toolchain_has_rust) {
config("edition_2024") {
rustflags = [ "--edition=2024" ]
}
config("edition_2021") {
rustflags = [ "--edition=2021" ]
}
config("edition_2018") {
rustflags = [ "--edition=2018" ]
}
config("edition_2015") {
rustflags = [ "--edition=2015" ]
}
if (enable_rust_cxx) {
# The required dependencies for cxx-generated bindings, that must be included
# on the C++ side.
static_library("cxx_cppdeps") {
sources = [
"//third_party/rust/chromium_crates_io/vendor/cxx-v1/include/cxx.h",
"//third_party/rust/chromium_crates_io/vendor/cxx-v1/src/cxx.cc",
# Our version-independent forwarding header, which we patch cxx.cc to
# use since we want it to use an absolute path for its include.
"//third_party/rust/cxx/v1/cxx.h",
]
defines = [ "RUST_CXX_NO_EXCEPTIONS" ]
# We cannot depend on base/base_export.h because base depends on us.
if (is_component_build) {
if (is_win) {
defines += [ "CXX_RS_EXPORT=__declspec(dllexport)" ]
} else {
defines +=
[ "CXX_RS_EXPORT=__attribute__((visibility(\"default\")))" ]
}
} else {
defines += [ "CXX_RS_EXPORT=" ]
}
deps = [
# Depending on the C++ bindings side of cxx then requires also depending
# on the Rust bindings, since one calls the other. And the Rust bindings
# require the Rust standard library.
":cxx_rustdeps",
]
}
group("cxx_rustdeps") {
# The required dependencies for cxx-generated bindings, that must be
# included on the Rust side.
public_deps = [ "//third_party/rust/cxx/v1:lib" ]
}
}
}
# Enables code behind #[cfg(test)]. This should only be used for targets where
# testonly=true.
config("test") {
rustflags = [
"--cfg",
"test",
]
}
# TODO(crbug.com/gn/104): GN rust_proc_macro targets are missing this
# command line flag, for the proc_macro crate which is provided by rustc for
# compiling proc-macros.
config("proc_macro_extern") {
rustflags = [
"--extern",
"proc_macro",
]
}
# Forbids unsafe code in crates with this config. See also `allow_unsafe` which
# may be set in 1) `rust_static_library`, `rust_executable` and other targets,
# 2) `gnrt_config.toml` entries for individual third-party crates.
config("forbid_unsafe") {
rustflags = [
# `-F` = "forbid". Documentation of the warning can be found in
# https://doc.rust-lang.org/rustc/lints/listing/allowed-by-default.html#unsafe-code
"-Funsafe_code",
]
}
config("panic_immediate_abort") {
visibility = [ "//build/rust/std/rules:*" ]
if (is_official_build) {
rustflags = [
"--cfg",
"feature=\"panic_immediate_abort\"",
]
}
}
config("is_gtest_unittests") {
rustflags = [
"--cfg",
"is_gtest_unittests",
]
}
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