1# Copyright 2023 The Chromium Authors 2# Use of this source code is governed by a BSD-style license that can be 3# found in the LICENSE file. 4 5# Provides per-crate and overall configuration options to gnrt. 6 7[all] 8# force-unstable-if-unmarked prevents normal crates from inadvertently using 9# symbols from std-internal dependencies in the sysroot. This is normally passed 10# during an x.py build, but we have to do it manually. 11rustflags = ['-Zforce-unstable-if-unmarked'] 12 13# Override the GN output dir. We direct std targets to output directly to the 14# sysroot we'll use later. This must stay in sync with `local_rustc_sysroot` in 15# //build/rust/std/BUILD.gn 16output_dir = '$root_out_dir/local_rustc_sysroot/lib/rustlib/$rust_abi_target/lib/' 17 18# This target provides setup needed for building std. 19extra_gn_deps = ['//build/rust/std:std_build_deps'] 20 21[crate.libc] 22# Many flags are set by libc's build.rs based on new enough rustc but we don't 23# run build scripts for std crates. 24# See https://github.com/rust-lang/libc/blob/master/build.rs 25cfg = ['libc_priv_mod_use', 'libc_union', 'libc_const_size_of', 'libc_align', 26'libc_int128', 'libc_core_cvoid', 'libc_packedN', 'libc_cfg_target_vendor', 27'libc_non_exhaustive', 'libc_long_array', 'libc_ptr_addr_of', 28'libc_underscore_const_names', 'libc_const_extern_fn' 29] 30 31[crate.std] 32# Requires: 33# * cfg(backtrace_in_libstd) because it directly includes .rs files from the 34# backtrace code rather than including it as a dependency. backtrace's 35# implementation has special-purpose code to handle this. 36# * STD_ENV_ARCH is referenced in architecture-dependent code. Note this is the 37# target arch, and as such `$rust_target_arch` is passed literally to GN. This 38# variable is set at build time in build/config/rust.gni 39# 40# See https://github.com/rust-lang/rust/blob/master/library/std/build.rs 41cfg = ['backtrace_in_libstd'] 42env = ['STD_ENV_ARCH=$rust_target_arch'] 43 44[crate.test] 45# Requires: 46# * CFG_DISABLE_UNSTABLE_FEATURES=0 to match how it's built by x.py. 47env = ['CFG_DISABLE_UNSTABLE_FEATURES=0'] 48 49# test only depends on proc_macro as an internal detail of the Rust build, so 50# it's implicitly included with std/test. However, we list the std crates and 51# construct the sysroot explicitly. We don't need this, and we don't even want 52# it during cross-compiles (since we will only build host proc_macro crates). 53exclude_deps_in_gn = ['proc_macro'] 54 55[crate.unwind] 56# The unwind crate has #[link] directives to the native unwind library, but we 57# either get that automatically by linking with clang++, or build and link the 58# lib from //buildtools/third_party/libunsind explicitly. Disable -lfoo linker 59# flags from this crate. 60rustflags = ['-Zlink-directives=false'] 61