# 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.

[resolve]
# There is a virtual "sysroot" crate that includes all sysroot libraries as
# dependencies.
root = "sysroot"

# Workaround for Cargo issue: hashbrown's Cargo.toml uses an unstable Cargo
# feature that leads to incorrect `cargo metadata` output.
#
# TODO(https://github.com/rust-lang/cargo/issues/10801): remove workaround once
# issue is fixed.
remove_crates = ['allocator-api2']

[all-crates]
# std crates should have metadata applied to them. This would avoid any symbol
# conflicts between std dependencies and third_party/rust crates.
#
# However, we can't apply it yet. GN can't automatically clean old artifacts,
# nor can we delete and rebuild the sysroot on every build.
#
# TODO(crbug.com/1245714): set up GN rules to rebuilt the sysroot only when
# needed. Then set this metadata.
#
# rustc_metadata = "libstd"

# 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_gn_deps = [
    '//build/rust/std:std_build_deps',
    '//build/rust/std:profiler_builtins_group',
]

[crate.compiler_builtins]
features = ['weak-intrinsics']
# Dependencies of profiler_builtins must have instrumentation disabled
remove_library_configs = ['//build/config/coverage:default_coverage']
extra_gn_deps_to_ignore = ['//build/rust/std:profiler_builtins_group']

[crate.core]
# Dependencies of profiler_builtins must have instrumentation disabled
remove_library_configs = ['//build/config/coverage:default_coverage']
extra_gn_deps_to_ignore = ['//build/rust/std:profiler_builtins_group']
add_library_configs = ['//build/rust:panic_immediate_abort']
extra_src_roots = ['../../portable-simd/crates/core_simd', '../../stdarch/crates/core_arch']
extra_input_roots = ['../primitive_docs']

[crate.hashbrown]
# Workaround for Cargo issue: hashbrown's Cargo.toml uses an unstable Cargo
# feature that leads to incorrect `cargo metadata` output.
#
# TODO(https://github.com/rust-lang/cargo/issues/10801): remove workaround once
# issue is fixed.
remove_deps = ['allocator-api2']

[crate.libc]
# The libc crate tries to link in the Windows CRT, but we specify the CRT
# library ourselves in //build/config/win:dynamic_crt and
# //build/config/win:static_crt because Rustc does not allow us to specify
# using the debug CRT: https://github.com/rust-lang/rust/issues/39016
rustflags = ['-Zlink-directives=false']

# This target is #[no_core] when included by std, which is incompatible with
# profiling.
remove_library_configs = ['//build/config/coverage:default_coverage']
extra_gn_deps_to_ignore = ['//build/rust/std:profiler_builtins_group']

[crate.profiler_builtins]
# The build script is used to compile a profiler-rt library, but we get
# the profiler rt library from clang, so we skip this.
skip_build_rs = true
# profiler_builtins cannot depend on itself, which it would if build with
# instrumentation.
remove_library_configs = ['//build/config/coverage:default_coverage']
extra_gn_deps_to_ignore = ['//build/rust/std:profiler_builtins_group']

[crate.rustc-std-workspace-alloc]
# This target is #[no_core] which is incompatible with profiling.
remove_library_configs = ['//build/config/coverage:default_coverage']
extra_gn_deps_to_ignore = ['//build/rust/std:profiler_builtins_group']

[crate.rustc-std-workspace-core]
# Dependencies of profiler_builtins must have instrumentation disabled
remove_library_configs = ['//build/config/coverage:default_coverage']
extra_gn_deps_to_ignore = ['//build/rust/std:profiler_builtins_group']

[crate.std]
# Requires:
# * STD_ENV_ARCH is referenced in architecture-dependent code. Note this is the
#   target arch, and as such `$rust_target_arch` is passed literally to GN. This
#   variable is set at build time in build/config/rust.gni
#
# See https://github.com/rust-lang/rust/blob/master/library/std/build.rs
#
# TODO(crbug.com/1448880): Our cargo emulation should use `cargo:rustc-env`
# to set the environment for the crate, then this goes away.
cfg = ['backtrace_in_libstd']
env = ['STD_ENV_ARCH=$rust_target_arch']
add_library_configs = ['//build/rust:panic_immediate_abort']
extra_src_roots = ['../../backtrace/src', '../../portable-simd/crates/std_float/src']
extra_input_roots = ['../primitive_docs', '../../core/src', '../../portable-simd/crates/core_simd/src', '../../stdarch/crates/core_arch/src']

# Remove this from std. It will be depended on directly when needed.
exclude_deps_in_gn = ['profiler_builtins']

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

# test only depends on proc_macro as an internal detail of the Rust build, so
# it's implicitly included with std/test. However, we list the std crates and
# construct the sysroot explicitly. We don't need this, and we don't even want
# it during cross-compiles (since we will only build host proc_macro crates).
exclude_deps_in_gn = ['proc_macro']

[crate.unwind]
# The build script is used to set up the link directives which we skip below.
# It uses `cc` to run a compiler to do so, which we don't support in build
# scripts.
skip_build_rs = true
# The unwind crate has #[link] directives to the native unwind library, but we
# either get that automatically by linking with clang++, or build and link the
# lib from //buildtools/third_party/libunsind explicitly. Disable -lfoo linker
# flags from this crate.
rustflags = ['-Zlink-directives=false']