build/rust/std/gnrt_config.toml

# Copyright 2023 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Provides per-crate and overall configuration options to gnrt.

[all]
# force-unstable-if-unmarked prevents normal crates from inadvertently using
# symbols from std-internal dependencies in the sysroot. This is normally passed
# during an x.py build, but we have to do it manually.
rustflags = ['-Zforce-unstable-if-unmarked']

# Override the GN output dir. We direct std targets to output directly to the
# sysroot we'll use later. This must stay in sync with `local_rustc_sysroot` in
# //build/rust/std/BUILD.gn
output_dir = '$root_out_dir/local_rustc_sysroot/lib/rustlib/$rust_abi_target/lib/'

# This target provides setup needed for building std.
extra_deps = ['//build/rust/std:std_build_deps']

[crate.libc]
# Requires:
# * cfg(libc_align) for new enough rustc, which is normally provided by build.rs
#   but we don't run build scripts for std crates.
# * cfg(libc_priv_mod_use) is required for the below to work properly.
# * cfg(libc_core_cvoid) to use the same ffi c_void definition as libcore.
#
# See https://github.com/rust-lang/libc/blob/master/build.rs
cfg = ['libc_align', 'libc_priv_mod_use', 'libc_core_cvoid']

[crate.std]
# Requires:
# * cfg(backtrace_in_libstd) because it directly includes .rs files from the
#   backtrace code rather than including it as a dependency. backtrace's
#   implementation has special-purpose code to handle this.
# * STD_ENV_ARCH is referenced in architecture-dependent code. Note this is the
#   target arch, and as such `$rust_target_arch` is passed literally to GN. This
#   variable is set at build time in build/config/rust.gni
#
# See https://github.com/rust-lang/rust/blob/master/library/std/build.rs
cfg = ['backtrace_in_libstd']
env = ['STD_ENV_ARCH=$rust_target_arch']

[crate.test]
# Requires:
# * CFG_DISABLE_UNSTABLE_FEATURES=0 to match how it's built by x.py.
env = ['CFG_DISABLE_UNSTABLE_FEATURES=0']