1//! This module defines the central `Config` struct, which aggregates all components2//! of the bootstrap configuration into a single unit.3//!4//! It serves as the primary public interface for accessing the bootstrap configuration.5//! The module coordinates the overall configuration parsing process using logic from `parsing.rs`6//! and provides top-level methods such as `Config::parse()` for initialization, as well as7//! utility methods for querying and manipulating the complete configuration state.8//!9//! Additionally, this module contains the core logic for parsing, validating, and inferring10//! the final `Config` from various raw inputs.11//!12//! It manages the process of reading command-line arguments, environment variables,13//! and the `bootstrap.toml` file—merging them, applying defaults, and performing14//! cross-component validation. The main `parse_inner` function and its supporting15//! helpers reside here, transforming raw `Toml` data into the structured `Config` type.16use std::cell::Cell;17use std::collections::{BTreeSet, HashMap, HashSet};18use std::io::IsTerminal;19use std::path::{Path, PathBuf, absolute};20use std::str::FromStr;21use std::sync::{Arc, Mutex};22use std::{cmp, env, fs};2324use build_helper::ci::CiEnv;25use build_helper::exit;26use build_helper::git::{GitConfig, PathFreshness, check_path_modifications};27use serde::Deserialize;28#[cfg(feature = "tracing")]29use tracing::{instrument, span};3031use crate::core::build_steps::llvm;32use crate::core::build_steps::llvm::LLVM_INVALIDATION_PATHS;33use crate::core::build_steps::test::failed_tests::collect_previously_failed_tests;34pub use crate::core::config::flags::Subcommand;35use crate::core::config::flags::{Color, Flags, Warnings};36use crate::core::config::target_selection::TargetSelectionList;37use crate::core::config::toml::TomlConfig;38use crate::core::config::toml::build::{Build, Tool};39use crate::core::config::toml::change_id::ChangeId;40use crate::core::config::toml::dist::Dist;41use crate::core::config::toml::gcc::Gcc;42use crate::core::config::toml::install::Install;43use crate::core::config::toml::llvm::Llvm;44use crate::core::config::toml::rust::{45 BootstrapOverrideLld, Rust, RustOptimize, check_incompatible_options_for_ci_rustc,46 parse_codegen_backends,47};48use crate::core::config::toml::target::{49 DefaultLinuxLinkerOverride, Target, TomlTarget, default_linux_linker_overrides,50};51use crate::core::config::{52 CompilerBuiltins, DebuginfoLevel, DryRun, GccCiMode, LlvmLibunwind, Merge, ReplaceOpt,53 RustcLto, SplitDebuginfo, StringOrBool, threads_from_config,54};55use crate::core::download::{56 DownloadContext, download_beta_toolchain, is_download_ci_available, maybe_download_rustfmt,57};58use crate::utils::channel;59use crate::utils::exec::{ExecutionContext, command};60use crate::utils::helpers::{exe, get_host_target};61use crate::{CodegenBackendKind, GitInfo, OnceLock, TargetSelection, check_ci_llvm, helpers, t};6263/// Each path in this list is considered "allowed" in the `download-rustc="if-unchanged"` logic.64/// This means they can be modified and changes to these paths should never trigger a compiler build65/// when "if-unchanged" is set.66///67/// NOTE: Paths must have the ":!" prefix to tell git to ignore changes in those paths during68/// the diff check.69///70/// WARNING: Be cautious when adding paths to this list. If a path that influences the compiler build71/// is added here, it will cause bootstrap to skip necessary rebuilds, which may lead to risky results.72/// For example, "src/bootstrap" should never be included in this list as it plays a crucial role in the73/// final output/compiler, which can be significantly affected by changes made to the bootstrap sources.74#[rustfmt::skip] // We don't want rustfmt to oneline this list75pub const RUSTC_IF_UNCHANGED_ALLOWED_PATHS: &[&str] = &[76 ":!library",77 ":!src/tools",78 ":!src/librustdoc",79 ":!src/rustdoc-json-types",80 ":!tests",81 ":!triagebot.toml",82 ":!src/bootstrap/defaults",83];8485/// Global configuration for the entire build and/or bootstrap.86///87/// This structure is parsed from `bootstrap.toml`, and some of the fields are inferred from `git` or build-time parameters.88///89/// Note that this structure is not decoded directly into, but rather it is90/// filled out from the decoded forms of the structs below. For documentation91/// on each field, see the corresponding fields in92/// `bootstrap.example.toml`.93#[derive(Clone)]94pub struct Config {95 pub change_id: Option<ChangeId>,96 pub bypass_bootstrap_lock: bool,97 pub ccache: Option<String>,98 /// Call Build::ninja() instead of this.99 pub ninja_in_file: bool,100 pub submodules: Option<bool>,101 pub compiler_docs: bool,102 pub library_docs_private_items: bool,103 pub docs_minification: bool,104 pub docs: bool,105 pub locked_deps: bool,106 pub vendor: bool,107 pub target_config: HashMap<TargetSelection, Target>,108 pub full_bootstrap: bool,109 pub bootstrap_cache_path: Option<PathBuf>,110 pub extended: bool,111 pub tools: Option<HashSet<String>>,112 /// Specify build configuration specific for some tool, such as enabled features, see [Tool].113 /// The key in the map is the name of the tool, and the value is tool-specific configuration.114 pub tool: HashMap<String, Tool>,115 pub sanitizers: bool,116 pub profiler: bool,117 pub omit_git_hash: bool,118 pub skip: Vec<PathBuf>,119 pub include_default_paths: bool,120 pub rustc_error_format: Option<String>,121 pub json_output: bool,122 pub compile_time_deps: bool,123 pub test_compare_mode: bool,124 pub color: Color,125 pub patch_binaries_for_nix: Option<bool>,126 pub stage0_metadata: build_helper::stage0_parser::Stage0,127 pub android_ndk: Option<PathBuf>,128 pub optimized_compiler_builtins: CompilerBuiltins,129 pub record_failed_tests_path: PathBuf,130131 pub stdout_is_tty: bool,132 pub stderr_is_tty: bool,133134 pub on_fail: Option<String>,135 pub explicit_stage_from_cli: bool,136 pub explicit_stage_from_config: bool,137 pub stage: u32,138 pub keep_stage: Vec<u32>,139 pub keep_stage_std: Vec<u32>,140 pub src: PathBuf,141 /// defaults to `bootstrap.toml`142 pub config: Option<PathBuf>,143 pub jobs: Option<u32>,144 pub cmd: Subcommand,145 pub quiet: bool,146 pub incremental: bool,147 pub dump_bootstrap_shims: bool,148 /// Arguments appearing after `--` to be forwarded to tools,149 /// e.g. `--fix-broken` or test arguments.150 pub free_args: Vec<String>,151152 /// `None` if we shouldn't download CI compiler artifacts, or the commit to download if we should.153 pub download_rustc_commit: Option<String>,154155 pub deny_warnings: bool,156 pub backtrace_on_ice: bool,157158 // llvm codegen options159 pub llvm_assertions: bool,160 pub llvm_tests: bool,161 pub llvm_enzyme: bool,162 pub llvm_offload: bool,163 pub llvm_plugins: bool,164 pub llvm_optimize: bool,165 pub llvm_thin_lto: bool,166 pub llvm_release_debuginfo: bool,167 pub llvm_static_stdcpp: bool,168 pub llvm_libzstd: bool,169 pub llvm_link_shared: Cell<Option<bool>>,170 pub llvm_clang_cl: Option<String>,171 pub llvm_targets: Option<String>,172 pub llvm_experimental_targets: Option<String>,173 pub llvm_link_jobs: Option<u32>,174 pub llvm_version_suffix: Option<String>,175 pub llvm_use_linker: Option<String>,176 pub llvm_clang_dir: Option<PathBuf>,177 pub llvm_allow_old_toolchain: bool,178 pub llvm_polly: bool,179 pub llvm_clang: bool,180 pub llvm_enable_warnings: bool,181 pub llvm_from_ci: bool,182 pub llvm_build_config: HashMap<String, String>,183184 pub bootstrap_override_lld: BootstrapOverrideLld,185 pub lld_enabled: bool,186 pub llvm_tools_enabled: bool,187 pub llvm_bitcode_linker_enabled: bool,188189 pub llvm_cflags: Option<String>,190 pub llvm_cxxflags: Option<String>,191 pub llvm_ldflags: Option<String>,192 pub llvm_use_libcxx: bool,193194 // gcc codegen options195 pub gcc_ci_mode: GccCiMode,196 pub libgccjit_libs_dir: Option<PathBuf>,197198 // rust codegen options199 pub rust_optimize: RustOptimize,200 pub rust_codegen_units: Option<u32>,201 pub rust_codegen_units_std: Option<u32>,202 pub rustc_debug_assertions: bool,203 pub std_debug_assertions: bool,204 pub tools_debug_assertions: bool,205206 pub rust_overflow_checks: bool,207 pub rust_overflow_checks_std: bool,208 pub rust_debug_logging: bool,209 pub rust_debuginfo_level_rustc: DebuginfoLevel,210 pub rust_debuginfo_level_std: DebuginfoLevel,211 pub rust_debuginfo_level_tools: DebuginfoLevel,212 pub rust_debuginfo_level_tests: DebuginfoLevel,213 pub rust_rpath: bool,214 pub rust_strip: bool,215 pub rust_frame_pointers: bool,216 pub rust_stack_protector: Option<String>,217 pub rustc_default_linker: Option<String>,218 pub rust_optimize_tests: bool,219 pub rust_dist_src: bool,220 pub rust_codegen_backends: Vec<CodegenBackendKind>,221 pub rust_verify_llvm_ir: bool,222 pub rust_thin_lto_import_instr_limit: Option<u32>,223 pub rust_randomize_layout: bool,224 pub rust_remap_debuginfo: bool,225 pub rust_new_symbol_mangling: Option<bool>,226 pub rust_annotate_moves_size_limit: Option<u64>,227 pub rust_profile_use: Option<String>,228 pub rust_profile_generate: Option<String>,229 pub rust_lto: RustcLto,230 pub rust_validate_mir_opts: Option<u32>,231 pub rust_std_features: BTreeSet<String>,232 pub rust_break_on_ice: bool,233 pub rust_parallel_frontend_threads: Option<u32>,234 pub rust_rustflags: Vec<String>,235236 pub llvm_profile_use: Option<String>,237 pub llvm_profile_generate: bool,238 pub llvm_libunwind_default: Option<LlvmLibunwind>,239 pub enable_bolt_settings: bool,240241 pub reproducible_artifacts: Vec<String>,242243 pub host_target: TargetSelection,244 pub hosts: Vec<TargetSelection>,245 pub targets: Vec<TargetSelection>,246 pub local_rebuild: bool,247 pub jemalloc: bool,248 pub control_flow_guard: bool,249 pub ehcont_guard: bool,250251 // dist misc252 pub dist_sign_folder: Option<PathBuf>,253 pub dist_upload_addr: Option<String>,254 pub dist_compression_formats: Option<Vec<String>>,255 pub dist_compression_profile: String,256 pub dist_include_mingw_linker: bool,257 pub dist_vendor: bool,258259 // libstd features260 pub backtrace: bool, // support for RUST_BACKTRACE261262 // misc263 pub low_priority: bool,264 pub channel: String,265 pub description: Option<String>,266 pub verbose_tests: bool,267 pub save_toolstates: Option<PathBuf>,268 pub print_step_timings: bool,269 pub print_step_rusage: bool,270271 // Fallback musl-root for all targets272 pub musl_root: Option<PathBuf>,273 pub prefix: Option<PathBuf>,274 pub sysconfdir: Option<PathBuf>,275 pub datadir: Option<PathBuf>,276 pub docdir: Option<PathBuf>,277 pub bindir: PathBuf,278 pub libdir: Option<PathBuf>,279 pub mandir: Option<PathBuf>,280 pub codegen_tests: bool,281 pub nodejs: Option<PathBuf>,282 pub yarn: Option<PathBuf>,283 pub gdb: Option<PathBuf>,284 pub lldb: Option<PathBuf>,285 pub python: Option<PathBuf>,286 pub windows_rc: Option<PathBuf>,287 pub reuse: Option<PathBuf>,288 pub cargo_native_static: bool,289 pub configure_args: Vec<String>,290 pub out: PathBuf,291 pub rust_info: channel::GitInfo,292293 pub cargo_info: channel::GitInfo,294 pub rust_analyzer_info: channel::GitInfo,295 pub clippy_info: channel::GitInfo,296 pub miri_info: channel::GitInfo,297 pub rustfmt_info: channel::GitInfo,298 pub enzyme_info: channel::GitInfo,299 pub in_tree_llvm_info: channel::GitInfo,300 pub in_tree_gcc_info: channel::GitInfo,301302 // These are either the stage0 downloaded binaries or the locally installed ones.303 pub initial_cargo: PathBuf,304 pub initial_rustc: PathBuf,305 pub initial_rustdoc: PathBuf,306 pub initial_cargo_clippy: Option<PathBuf>,307 pub initial_sysroot: PathBuf,308 pub initial_rustfmt: Option<PathBuf>,309310 /// The paths to work with. For example: with `./x check foo bar` we get311 /// `paths=["foo", "bar"]`.312 pub paths: Vec<PathBuf>,313314 /// Command for visual diff display, e.g. `diff-tool --color=always`.315 pub compiletest_diff_tool: Option<String>,316317 /// Whether to allow running both `compiletest` self-tests and `compiletest`-managed test suites318 /// against the stage 0 (rustc, std).319 ///320 /// This is only intended to be used when the stage 0 compiler is actually built from in-tree321 /// sources.322 pub compiletest_allow_stage0: bool,323324 /// Default value for `--extra-checks`325 pub tidy_extra_checks: Option<String>,326 pub ci_env: CiEnv,327328 /// Cache for determining path modifications329 pub path_modification_cache: Arc<Mutex<HashMap<Vec<&'static str>, PathFreshness>>>,330331 /// Skip checking the standard library if `rust.download-rustc` isn't available.332 /// This is mostly for RA as building the stage1 compiler to check the library tree333 /// on each code change might be too much for some computers.334 pub skip_std_check_if_no_download_rustc: bool,335336 pub exec_ctx: ExecutionContext,337}338339impl Config {340 pub fn set_dry_run(&mut self, dry_run: DryRun) {341 self.exec_ctx.set_dry_run(dry_run);342 }343344 pub fn get_dry_run(&self) -> &DryRun {345 self.exec_ctx.get_dry_run()346 }347348 #[cfg_attr(349 feature = "tracing",350 instrument(target = "CONFIG_HANDLING", level = "trace", name = "Config::parse", skip_all)351 )]352 pub fn parse(flags: Flags) -> Config {353 Self::parse_inner(flags, Self::get_toml)354 }355356 #[cfg_attr(357 feature = "tracing",358 instrument(359 target = "CONFIG_HANDLING",360 level = "trace",361 name = "Config::parse_inner",362 skip_all363 )364 )]365 pub(crate) fn parse_inner(366 flags: Flags,367 get_toml: impl Fn(&Path) -> Result<TomlConfig, toml::de::Error>,368 ) -> Config {369 // Destructure flags to ensure that we use all its fields370 // The field variables are prefixed with `flags_` to avoid clashes371 // with values from TOML config files with same names.372 let Flags {373 cmd: flags_cmd,374 verbose: flags_verbose,375 quiet: flags_quiet,376 incremental: flags_incremental,377 config: flags_config,378 build_dir: flags_build_dir,379 build: flags_build,380 host: flags_host,381 target: flags_target,382 exclude: flags_exclude,383 skip: flags_skip,384 include_default_paths: flags_include_default_paths,385 rustc_error_format: flags_rustc_error_format,386 on_fail: flags_on_fail,387 dry_run: flags_dry_run,388 dump_bootstrap_shims: flags_dump_bootstrap_shims,389 stage: flags_stage,390 keep_stage: flags_keep_stage,391 keep_stage_std: flags_keep_stage_std,392 src: flags_src,393 jobs: flags_jobs,394 warnings: flags_warnings,395 json_output: flags_json_output,396 compile_time_deps: flags_compile_time_deps,397 color: flags_color,398 bypass_bootstrap_lock: flags_bypass_bootstrap_lock,399 rust_profile_generate: flags_rust_profile_generate,400 rust_profile_use: flags_rust_profile_use,401 llvm_profile_use: flags_llvm_profile_use,402 llvm_profile_generate: flags_llvm_profile_generate,403 enable_bolt_settings: flags_enable_bolt_settings,404 skip_stage0_validation: flags_skip_stage0_validation,405 reproducible_artifact: flags_reproducible_artifact,406 paths: flags_paths,407 set: flags_set,408 free_args: flags_free_args,409 ci: flags_ci,410 skip_std_check_if_no_download_rustc: flags_skip_std_check_if_no_download_rustc,411 } = flags;412413 #[cfg(feature = "tracing")]414 span!(415 target: "CONFIG_HANDLING",416 tracing::Level::TRACE,417 "collecting paths and path exclusions",418 "flags.paths" = ?flags_paths,419 "flags.skip" = ?flags_skip,420 "flags.exclude" = ?flags_exclude421 );422423 if flags_cmd.no_doc() {424 eprintln!(425 "WARN: `x.py test --no-doc` is renamed to `--all-targets`. `--no-doc` will be removed in the near future. Additionally `--tests` is added which only executes unit and integration tests."426 )427 }428429 // Set config values based on flags.430 let mut exec_ctx = ExecutionContext::new(flags_verbose, flags_cmd.fail_fast());431 exec_ctx.set_dry_run(if flags_dry_run { DryRun::UserSelected } else { DryRun::Disabled });432433 let default_src_dir = {434 let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));435 // Undo `src/bootstrap`436 manifest_dir.parent().unwrap().parent().unwrap().to_owned()437 };438 let src = if let Some(s) = compute_src_directory(flags_src, &exec_ctx) {439 s440 } else {441 default_src_dir.clone()442 };443444 #[cfg(test)]445 {446 if let Some(config_path) = flags_config.as_ref() {447 assert!(448 !config_path.starts_with(&src),449 "Path {config_path:?} should not be inside or equal to src dir {src:?}"450 );451 } else {452 panic!("During test the config should be explicitly added");453 }454 }455456 // Now load the TOML config, as soon as possible457 let (mut toml, toml_path) = load_toml_config(&src, flags_config, &get_toml);458459 postprocess_toml(&mut toml, &src, toml_path.clone(), &exec_ctx, &flags_set, &get_toml);460461 // Now override TOML values with flags, to make sure that we won't later override flags with462 // TOML values by accident instead, because flags have higher priority.463 let Build {464 description: build_description,465 build: build_build,466 host: build_host,467 target: build_target,468 build_dir: build_build_dir,469 cargo: mut build_cargo,470 rustc: mut build_rustc,471 rustdoc: build_rustdoc,472 rustfmt: build_rustfmt,473 cargo_clippy: build_cargo_clippy,474 docs: build_docs,475 compiler_docs: build_compiler_docs,476 library_docs_private_items: build_library_docs_private_items,477 docs_minification: build_docs_minification,478 submodules: build_submodules,479 gdb: build_gdb,480 lldb: build_lldb,481 nodejs: build_nodejs,482483 yarn: build_yarn,484 npm: build_npm,485 python: build_python,486 windows_rc: build_windows_rc,487 reuse: build_reuse,488 locked_deps: build_locked_deps,489 vendor: build_vendor,490 full_bootstrap: build_full_bootstrap,491 bootstrap_cache_path: build_bootstrap_cache_path,492 extended: build_extended,493 tools: build_tools,494 tool: build_tool,495 verbose: build_verbose,496 sanitizers: build_sanitizers,497 profiler: build_profiler,498 cargo_native_static: build_cargo_native_static,499 low_priority: build_low_priority,500 configure_args: build_configure_args,501 local_rebuild: build_local_rebuild,502 print_step_timings: build_print_step_timings,503 print_step_rusage: build_print_step_rusage,504 check_stage: build_check_stage,505 doc_stage: build_doc_stage,506 build_stage: build_build_stage,507 test_stage: build_test_stage,508 install_stage: build_install_stage,509 dist_stage: build_dist_stage,510 bench_stage: build_bench_stage,511 patch_binaries_for_nix: build_patch_binaries_for_nix,512 record_failed_tests_path: build_record_failed_tests_path,513 // This field is only used by bootstrap.py514 metrics: _,515 android_ndk: build_android_ndk,516 optimized_compiler_builtins: build_optimized_compiler_builtins,517 jobs: build_jobs,518 compiletest_diff_tool: build_compiletest_diff_tool,519 // No longer has any effect; kept (for now) to avoid breaking people's configs.520 compiletest_use_stage0_libtest: _,521 tidy_extra_checks: build_tidy_extra_checks,522 ccache: build_ccache,523 exclude: build_exclude,524 compiletest_allow_stage0: build_compiletest_allow_stage0,525 } = toml.build.unwrap_or_default();526527 let Install {528 prefix: install_prefix,529 sysconfdir: install_sysconfdir,530 docdir: install_docdir,531 bindir: install_bindir,532 libdir: install_libdir,533 mandir: install_mandir,534 datadir: install_datadir,535 } = toml.install.unwrap_or_default();536537 let Rust {538 optimize: rust_optimize,539 debug: rust_debug,540 codegen_units: rust_codegen_units,541 codegen_units_std: rust_codegen_units_std,542 rustc_debug_assertions: rust_rustc_debug_assertions,543 std_debug_assertions: rust_std_debug_assertions,544 tools_debug_assertions: rust_tools_debug_assertions,545 overflow_checks: rust_overflow_checks,546 overflow_checks_std: rust_overflow_checks_std,547 debug_logging: rust_debug_logging,548 debuginfo_level: rust_debuginfo_level,549 debuginfo_level_rustc: rust_debuginfo_level_rustc,550 debuginfo_level_std: rust_debuginfo_level_std,551 debuginfo_level_tools: rust_debuginfo_level_tools,552 debuginfo_level_tests: rust_debuginfo_level_tests,553 backtrace: rust_backtrace,554 incremental: rust_incremental,555 randomize_layout: rust_randomize_layout,556 default_linker: rust_default_linker,557 channel: rust_channel,558 musl_root: rust_musl_root,559 rpath: rust_rpath,560 verbose_tests: rust_verbose_tests,561 optimize_tests: rust_optimize_tests,562 codegen_tests: rust_codegen_tests,563 omit_git_hash: rust_omit_git_hash,564 dist_src: rust_dist_src,565 save_toolstates: rust_save_toolstates,566 codegen_backends: rust_codegen_backends,567 lld: rust_lld_enabled,568 llvm_tools: rust_llvm_tools,569 llvm_bitcode_linker: rust_llvm_bitcode_linker,570 deny_warnings: rust_deny_warnings,571 backtrace_on_ice: rust_backtrace_on_ice,572 verify_llvm_ir: rust_verify_llvm_ir,573 thin_lto_import_instr_limit: rust_thin_lto_import_instr_limit,574 parallel_frontend_threads: rust_parallel_frontend_threads,575 remap_debuginfo: rust_remap_debuginfo,576 jemalloc: rust_jemalloc,577 test_compare_mode: rust_test_compare_mode,578 llvm_libunwind: rust_llvm_libunwind,579 control_flow_guard: rust_control_flow_guard,580 ehcont_guard: rust_ehcont_guard,581 new_symbol_mangling: rust_new_symbol_mangling,582 annotate_moves_size_limit: rust_annotate_moves_size_limit,583 profile_generate: rust_profile_generate,584 profile_use: rust_profile_use,585 download_rustc: rust_download_rustc,586 lto: rust_lto,587 validate_mir_opts: rust_validate_mir_opts,588 frame_pointers: rust_frame_pointers,589 stack_protector: rust_stack_protector,590 strip: rust_strip,591 bootstrap_override_lld: rust_bootstrap_override_lld,592 bootstrap_override_lld_legacy: rust_bootstrap_override_lld_legacy,593 std_features: rust_std_features,594 break_on_ice: rust_break_on_ice,595 rustflags: rust_rustflags,596 } = toml.rust.unwrap_or_default();597598 let Llvm {599 optimize: llvm_optimize,600 thin_lto: llvm_thin_lto,601 release_debuginfo: llvm_release_debuginfo,602 assertions: llvm_assertions,603 tests: llvm_tests,604 enzyme: llvm_enzyme,605 plugins: llvm_plugin,606 static_libstdcpp: llvm_static_libstdcpp,607 libzstd: llvm_libzstd,608 ninja: llvm_ninja,609 targets: llvm_targets,610 experimental_targets: llvm_experimental_targets,611 link_jobs: llvm_link_jobs,612 link_shared: llvm_link_shared,613 version_suffix: llvm_version_suffix,614 clang_cl: llvm_clang_cl,615 cflags: llvm_cflags,616 cxxflags: llvm_cxxflags,617 ldflags: llvm_ldflags,618 use_libcxx: llvm_use_libcxx,619 use_linker: llvm_use_linker,620 allow_old_toolchain: llvm_allow_old_toolchain,621 offload: llvm_offload,622 offload_clang_dir: llvm_clang_dir,623 polly: llvm_polly,624 clang: llvm_clang,625 enable_warnings: llvm_enable_warnings,626 download_ci_llvm: llvm_download_ci_llvm,627 build_config: llvm_build_config,628 } = toml.llvm.unwrap_or_default();629630 let Dist {631 sign_folder: dist_sign_folder,632 upload_addr: dist_upload_addr,633 src_tarball: dist_src_tarball,634 compression_formats: dist_compression_formats,635 compression_profile: dist_compression_profile,636 include_mingw_linker: dist_include_mingw_linker,637 vendor: dist_vendor,638 } = toml.dist.unwrap_or_default();639640 let Gcc {641 download_ci_gcc: gcc_download_ci_gcc,642 libgccjit_libs_dir: gcc_libgccjit_libs_dir,643 } = toml.gcc.unwrap_or_default();644645 if rust_bootstrap_override_lld.is_some() && rust_bootstrap_override_lld_legacy.is_some() {646 panic!(647 "Cannot use both `rust.use-lld` and `rust.bootstrap-override-lld`. Please use only `rust.bootstrap-override-lld`"648 );649 }650651 let bootstrap_override_lld =652 rust_bootstrap_override_lld.or(rust_bootstrap_override_lld_legacy).unwrap_or_default();653654 if rust_optimize.as_ref().is_some_and(|v| matches!(v, RustOptimize::Bool(false))) {655 eprintln!(656 "WARNING: setting `optimize` to `false` is known to cause errors and \657 should be considered unsupported. Refer to `bootstrap.example.toml` \658 for more details."659 );660 }661662 // Prefer CLI verbosity flags if set (`flags_verbose` > 0), otherwise take the value from663 // TOML.664 exec_ctx.set_verbosity(cmp::max(build_verbose.unwrap_or_default() as u8, flags_verbose));665666 let stage0_metadata = build_helper::stage0_parser::parse_stage0_file();667 let path_modification_cache = Arc::new(Mutex::new(HashMap::new()));668669 let host_target = flags_build670 .or(build_build)671 .map(|build| TargetSelection::from_user(&build))672 .unwrap_or_else(get_host_target);673 let hosts = flags_host674 .map(|TargetSelectionList(hosts)| hosts)675 .or_else(|| {676 build_host.map(|h| h.iter().map(|t| TargetSelection::from_user(t)).collect())677 })678 .unwrap_or_else(|| vec![host_target]);679680 let llvm_assertions = llvm_assertions.unwrap_or(false);681 let mut target_config = HashMap::new();682 let mut channel = "dev".to_string();683684 let out = flags_build_dir.or_else(|| build_build_dir.map(PathBuf::from));685 let out = if cfg!(test) {686 out.expect("--build-dir has to be specified in tests")687 } else {688 out.unwrap_or_else(|| PathBuf::from("build"))689 };690691 // NOTE: Bootstrap spawns various commands with different working directories.692 // To avoid writing to random places on the file system, `config.out` needs to be an absolute path.693 let mut out = if !out.is_absolute() {694 // `canonicalize` requires the path to already exist. Use our vendored copy of `absolute` instead.695 absolute(&out).expect("can't make empty path absolute")696 } else {697 out698 };699700 let default_stage0_rustc_path = |dir: &Path| {701 dir.join(host_target).join("stage0").join("bin").join(exe("rustc", host_target))702 };703704 if cfg!(test) {705 // When configuring bootstrap for tests, make sure to set the rustc and Cargo to the706 // same ones used to call the tests (if custom ones are not defined in the toml). If we707 // don't do that, bootstrap will use its own detection logic to find a suitable rustc708 // and Cargo, which doesn't work when the caller is specìfying a custom local rustc or709 // Cargo in their bootstrap.toml.710 build_rustc = build_rustc.take().or(std::env::var_os("RUSTC").map(|p| p.into()));711 build_cargo = build_cargo.take().or(std::env::var_os("CARGO").map(|p| p.into()));712713 // If we are running only `cargo test` (and not `x test bootstrap`), which is useful714 // e.g. for debugging bootstrap itself, then we won't have RUSTC and CARGO set to the715 // proper paths.716 // We thus "guess" that the build directory is located at <src>/build, and try to load717 // rustc and cargo from there718 let is_test_outside_x = std::env::var("CARGO_TARGET_DIR").is_err();719 if is_test_outside_x && build_rustc.is_none() {720 let stage0_rustc = default_stage0_rustc_path(&default_src_dir.join("build"));721 assert!(722 stage0_rustc.exists(),723 "Trying to run cargo test without having a stage0 rustc available in {}",724 stage0_rustc.display()725 );726 build_rustc = Some(stage0_rustc);727 }728 }729730 if !flags_skip_stage0_validation {731 if let Some(rustc) = &build_rustc {732 check_stage0_version(rustc, "rustc", &src, &exec_ctx);733 }734 if let Some(cargo) = &build_cargo {735 check_stage0_version(cargo, "cargo", &src, &exec_ctx);736 }737 }738739 if build_cargo_clippy.is_some() && build_rustc.is_none() {740 println!(741 "WARNING: Using `build.cargo-clippy` without `build.rustc` usually fails due to toolchain conflict."742 );743 }744745 let ci_env = match flags_ci {746 Some(true) => CiEnv::GitHubActions,747 Some(false) => CiEnv::None,748 None => CiEnv::current(),749 };750 let dwn_ctx = DownloadContext {751 path_modification_cache: path_modification_cache.clone(),752 src: &src,753 submodules: &build_submodules,754 host_target,755 patch_binaries_for_nix: build_patch_binaries_for_nix,756 exec_ctx: &exec_ctx,757 stage0_metadata: &stage0_metadata,758 llvm_assertions,759 bootstrap_cache_path: &build_bootstrap_cache_path,760 ci_env,761 };762763 let initial_rustc = build_rustc.unwrap_or_else(|| {764 download_beta_toolchain(&dwn_ctx, &out);765 default_stage0_rustc_path(&out)766 });767768 let initial_rustdoc = build_rustdoc769 .unwrap_or_else(|| initial_rustc.with_file_name(exe("rustdoc", host_target)));770771 let initial_sysroot = t!(PathBuf::from_str(772 command(&initial_rustc)773 .args(["--print", "sysroot"])774 .run_in_dry_run()775 .run_capture_stdout(&exec_ctx)776 .stdout()777 .trim()778 ));779780 let initial_cargo = build_cargo.unwrap_or_else(|| {781 download_beta_toolchain(&dwn_ctx, &out);782 initial_sysroot.join("bin").join(exe("cargo", host_target))783 });784785 // NOTE: it's important this comes *after* we set `initial_rustc` just above.786 if exec_ctx.dry_run() {787 out = out.join("tmp-dry-run");788 fs::create_dir_all(&out).expect("Failed to create dry-run directory");789 }790791 let file_content = t!(fs::read_to_string(src.join("src/ci/channel")));792 let ci_channel = file_content.trim_end();793794 let is_user_configured_rust_channel = match rust_channel {795 Some(channel_) if channel_ == "auto-detect" => {796 channel = ci_channel.into();797 true798 }799 Some(channel_) => {800 channel = channel_;801 true802 }803 None => false,804 };805806 let omit_git_hash = rust_omit_git_hash.unwrap_or(channel == "dev");807808 let rust_info = git_info(&exec_ctx, omit_git_hash, &src);809810 if !is_user_configured_rust_channel && rust_info.is_from_tarball() {811 channel = ci_channel.into();812 }813814 // FIXME(#133381): alt rustc builds currently do *not* have rustc debug assertions815 // enabled. We should not download a CI alt rustc if we need rustc to have debug816 // assertions (e.g. for crashes test suite). This can be changed once something like817 // [Enable debug assertions on alt818 // builds](https://github.com/rust-lang/rust/pull/131077) lands.819 //820 // Note that `rust.debug = true` currently implies `rust.debug-assertions = true`!821 //822 // This relies also on the fact that the global default for `download-rustc` will be823 // `false` if it's not explicitly set.824 let debug_assertions_requested = matches!(rust_rustc_debug_assertions, Some(true))825 || (matches!(rust_debug, Some(true))826 && !matches!(rust_rustc_debug_assertions, Some(false)));827828 if debug_assertions_requested829 && let Some(ref opt) = rust_download_rustc830 && opt.is_string_or_true()831 {832 eprintln!(833 "WARN: currently no CI rustc builds have rustc debug assertions \834 enabled. Please either set `rust.debug-assertions` to `false` if you \835 want to use download CI rustc or set `rust.download-rustc` to `false`."836 );837 }838839 let mut download_rustc_commit =840 download_ci_rustc_commit(&dwn_ctx, &rust_info, rust_download_rustc, llvm_assertions);841842 if debug_assertions_requested && download_rustc_commit.is_some() {843 eprintln!(844 "WARN: `rust.debug-assertions = true` will prevent downloading CI rustc as alt CI \845 rustc is not currently built with debug assertions."846 );847 // We need to put this later down_ci_rustc_commit.848 download_rustc_commit = None;849 }850851 // We need to override `rust.channel` if it's manually specified when using the CI rustc.852 // This is because if the compiler uses a different channel than the one specified in bootstrap.toml,853 // tests may fail due to using a different channel than the one used by the compiler during tests.854 if let Some(commit) = &download_rustc_commit855 && is_user_configured_rust_channel856 {857 println!(858 "WARNING: `rust.download-rustc` is enabled. The `rust.channel` option will be overridden by the CI rustc's channel."859 );860861 channel =862 read_file_by_commit(&dwn_ctx, &rust_info, Path::new("src/ci/channel"), commit)863 .trim()864 .to_owned();865 }866867 if build_npm.is_some() {868 println!(869 "WARNING: `build.npm` set in bootstrap.toml, this option no longer has any effect. . Use `build.yarn` instead to provide a path to a `yarn` binary."870 );871 }872873 let mut lld_enabled = rust_lld_enabled.unwrap_or(false);874875 // Linux targets for which the user explicitly overrode the used linker876 let mut targets_with_user_linker_override = HashSet::new();877878 if let Some(t) = toml.target {879 for (triple, cfg) in t {880 let TomlTarget {881 cc: target_cc,882 cxx: target_cxx,883 ar: target_ar,884 ranlib: target_ranlib,885 default_linker: target_default_linker,886 default_linker_linux_override: target_default_linker_linux_override,887 linker: target_linker,888 split_debuginfo: target_split_debuginfo,889 llvm_config: target_llvm_config,890 llvm_has_rust_patches: target_llvm_has_rust_patches,891 llvm_filecheck: target_llvm_filecheck,892 llvm_libunwind: target_llvm_libunwind,893 sanitizers: target_sanitizers,894 profiler: target_profiler,895 rpath: target_rpath,896 rustflags: target_rustflags,897 crt_static: target_crt_static,898 musl_root: target_musl_root,899 musl_libdir: target_musl_libdir,900 wasi_root: target_wasi_root,901 qemu_rootfs: target_qemu_rootfs,902 no_std: target_no_std,903 codegen_backends: target_codegen_backends,904 runner: target_runner,905 optimized_compiler_builtins: target_optimized_compiler_builtins,906 jemalloc: target_jemalloc,907 } = cfg;908909 let mut target = Target::from_triple(&triple);910911 if target_default_linker_linux_override.is_some() {912 targets_with_user_linker_override.insert(triple.clone());913 }914915 let default_linker_linux_override = match target_default_linker_linux_override {916 Some(DefaultLinuxLinkerOverride::SelfContainedLldCc) => {917 if rust_default_linker.is_some() {918 panic!(919 "cannot set both `default-linker` and `default-linker-linux` for target `{triple}`"920 );921 }922 if !triple.contains("linux-gnu") {923 panic!(924 "`default-linker-linux` can only be set for Linux GNU targets, not for `{triple}`"925 );926 }927 if !lld_enabled {928 panic!(929 "Trying to override the default Linux linker for `{triple}` to be self-contained LLD, but LLD is not being built. Enable it with rust.lld = true."930 );931 }932 DefaultLinuxLinkerOverride::SelfContainedLldCc933 }934 Some(DefaultLinuxLinkerOverride::Off) => DefaultLinuxLinkerOverride::Off,935 None => DefaultLinuxLinkerOverride::default(),936 };937938 if let Some(ref s) = target_llvm_config {939 if download_rustc_commit.is_some() && triple == *host_target.triple {940 panic!(941 "setting llvm_config for the host is incompatible with download-rustc"942 );943 }944 target.llvm_config = Some(src.join(s));945 }946 if let Some(patches) = target_llvm_has_rust_patches {947 assert!(948 build_submodules == Some(false) || target_llvm_config.is_some(),949 "use of `llvm-has-rust-patches` is restricted to cases where either submodules are disabled or llvm-config been provided"950 );951 target.llvm_has_rust_patches = Some(patches);952 }953 if let Some(ref s) = target_llvm_filecheck {954 target.llvm_filecheck = Some(src.join(s));955 }956 target.llvm_libunwind = target_llvm_libunwind.as_ref().map(|v| {957 v.parse().unwrap_or_else(|_| {958 panic!("failed to parse target.{triple}.llvm-libunwind")959 })960 });961 if let Some(s) = target_no_std {962 target.no_std = s;963 }964 target.cc = target_cc.map(PathBuf::from);965 target.cxx = target_cxx.map(PathBuf::from);966 target.ar = target_ar.map(PathBuf::from);967 target.ranlib = target_ranlib.map(PathBuf::from);968 target.linker = target_linker.map(PathBuf::from);969 target.crt_static = target_crt_static;970 target.default_linker = target_default_linker;971 target.default_linker_linux_override = default_linker_linux_override;972 target.musl_root = target_musl_root.map(PathBuf::from);973 target.musl_libdir = target_musl_libdir.map(PathBuf::from);974 target.wasi_root = target_wasi_root.map(PathBuf::from);975 target.qemu_rootfs = target_qemu_rootfs.map(PathBuf::from);976 target.runner = target_runner;977 target.sanitizers = target_sanitizers;978 target.profiler = target_profiler;979 target.rpath = target_rpath;980 target.rustflags = target_rustflags.unwrap_or_default();981 target.optimized_compiler_builtins = target_optimized_compiler_builtins;982 target.jemalloc = target_jemalloc;983 if let Some(backends) = target_codegen_backends {984 target.codegen_backends =985 Some(parse_codegen_backends(backends, &format!("target.{triple}")))986 }987988 target.split_debuginfo = target_split_debuginfo.as_ref().map(|v| {989 v.parse().unwrap_or_else(|_| {990 panic!("invalid value for target.{triple}.split-debuginfo")991 })992 });993994 target_config.insert(TargetSelection::from_user(&triple), target);995 }996 }997998 let llvm_from_ci = parse_download_ci_llvm(999 &dwn_ctx,1000 &rust_info,1001 &download_rustc_commit,1002 llvm_download_ci_llvm,1003 llvm_assertions,1004 );1005 let is_host_system_llvm =1006 is_system_llvm(&target_config, llvm_from_ci, host_target, host_target);10071008 if llvm_from_ci {1009 let warn = |option: &str| {1010 println!(1011 "WARNING: `{option}` will only be used on `compiler/rustc_llvm` build, not for the LLVM build."1012 );1013 println!(1014 "HELP: To use `{option}` for LLVM builds, set `download-ci-llvm` option to false."1015 );1016 };10171018 if llvm_static_libstdcpp.is_some() {1019 warn("static-libstdcpp");1020 }10211022 if llvm_link_shared.is_some() {1023 warn("link-shared");1024 }10251026 // FIXME(#129153): instead of all the ad-hoc `download-ci-llvm` checks that follow,1027 // use the `builder-config` present in tarballs since #128822 to compare the local1028 // config to the ones used to build the LLVM artifacts on CI, and only notify users1029 // if they've chosen a different value.10301031 if llvm_libzstd.is_some() {1032 println!(1033 "WARNING: when using `download-ci-llvm`, the local `llvm.libzstd` option, \1034 like almost all `llvm.*` options, will be ignored and set by the LLVM CI \1035 artifacts builder config."1036 );1037 println!(1038 "HELP: To use `llvm.libzstd` for LLVM/LLD builds, set `download-ci-llvm` option to false."1039 );1040 }1041 }10421043 if llvm_from_ci {1044 let triple = &host_target.triple;1045 let ci_llvm_bin = ci_llvm_root(&dwn_ctx, llvm_from_ci, &out).join("bin");1046 let build_target =1047 target_config.entry(host_target).or_insert_with(|| Target::from_triple(triple));1048 check_ci_llvm!(build_target.llvm_config);1049 check_ci_llvm!(build_target.llvm_filecheck);1050 build_target.llvm_config = Some(ci_llvm_bin.join(exe("llvm-config", host_target)));1051 build_target.llvm_filecheck = Some(ci_llvm_bin.join(exe("FileCheck", host_target)));1052 }10531054 for (target, linker_override) in default_linux_linker_overrides() {1055 // If the user overrode the default Linux linker, do not apply bootstrap defaults1056 if targets_with_user_linker_override.contains(&target) {1057 continue;1058 }10591060 // The rust.lld option is global, and not target specific, so if we enable it, it will1061 // be applied to all targets being built.1062 // So we only apply an override if we're building a compiler/host code for the given1063 // override target.1064 // Note: we could also make the LLD config per-target, but that would complicate things1065 if !hosts.contains(&TargetSelection::from_user(&target)) {1066 continue;1067 }10681069 let default_linux_linker_override = match linker_override {1070 DefaultLinuxLinkerOverride::Off => continue,1071 DefaultLinuxLinkerOverride::SelfContainedLldCc => {1072 // If we automatically default to the self-contained LLD linker,1073 // we also need to handle the rust.lld option.1074 match rust_lld_enabled {1075 // If LLD was not enabled explicitly, we enable it, unless LLVM config has1076 // been set1077 None if !is_host_system_llvm => {1078 lld_enabled = true;1079 Some(DefaultLinuxLinkerOverride::SelfContainedLldCc)1080 }1081 None => None,1082 // If it was enabled already, we don't need to do anything1083 Some(true) => Some(DefaultLinuxLinkerOverride::SelfContainedLldCc),1084 // If it was explicitly disabled, we do not apply the1085 // linker override1086 Some(false) => None,1087 }1088 }1089 };1090 if let Some(linker_override) = default_linux_linker_override {1091 target_config1092 .entry(TargetSelection::from_user(&target))1093 .or_default()1094 .default_linker_linux_override = linker_override;1095 }1096 }10971098 let initial_rustfmt = build_rustfmt.or_else(|| maybe_download_rustfmt(&dwn_ctx, &out));10991100 if matches!(bootstrap_override_lld, BootstrapOverrideLld::SelfContained)1101 && !lld_enabled1102 && flags_stage.unwrap_or(0) > 01103 {1104 panic!(1105 "Trying to use self-contained lld as a linker, but LLD is not being added to the sysroot. Enable it with rust.lld = true."1106 );1107 }11081109 if lld_enabled && is_host_system_llvm {1110 panic!("Cannot enable LLD with `rust.lld = true` when using external llvm-config.");1111 }11121113 let download_rustc = download_rustc_commit.is_some();11141115 let stage = match flags_cmd {1116 Subcommand::Check { .. } => flags_stage.or(build_check_stage).unwrap_or(1),1117 Subcommand::Clippy { .. } | Subcommand::Fix => {1118 flags_stage.or(build_check_stage).unwrap_or(1)1119 }1120 // `download-rustc` only has a speed-up for stage2 builds. Default to stage2 unless explicitly overridden.1121 Subcommand::Doc { .. } => {1122 flags_stage.or(build_doc_stage).unwrap_or(if download_rustc { 2 } else { 1 })1123 }1124 Subcommand::Build { .. } => {1125 flags_stage.or(build_build_stage).unwrap_or(if download_rustc { 2 } else { 1 })1126 }1127 Subcommand::Test { .. } | Subcommand::Miri { .. } => {1128 flags_stage.or(build_test_stage).unwrap_or(if download_rustc { 2 } else { 1 })1129 }1130 Subcommand::Bench { .. } => flags_stage.or(build_bench_stage).unwrap_or(2),1131 Subcommand::Dist => flags_stage.or(build_dist_stage).unwrap_or(2),1132 Subcommand::Install => flags_stage.or(build_install_stage).unwrap_or(2),1133 Subcommand::Perf { .. } => flags_stage.unwrap_or(1),1134 // Most of the run commands execute bootstrap tools, which don't depend on the compiler.1135 // Other commands listed here should always use bootstrap tools.1136 Subcommand::Clean { .. }1137 | Subcommand::Run { .. }1138 | Subcommand::Setup { .. }1139 | Subcommand::Format { .. }1140 | Subcommand::Vendor { .. } => flags_stage.unwrap_or(0),1141 };11421143 let local_rebuild = build_local_rebuild.unwrap_or(false);11441145 let check_stage0 = |kind: &str| {1146 if local_rebuild {1147 eprintln!("WARNING: running {kind} in stage 0. This might not work as expected.");1148 } else {1149 eprintln!(1150 "ERROR: cannot {kind} anything on stage 0. Use at least stage 1 or set build.local-rebuild=true and use a stage0 compiler built from in-tree sources."1151 );1152 exit!(1);1153 }1154 };11551156 // Now check that the selected stage makes sense, and if not, print an error and end1157 match (stage, &flags_cmd) {1158 (0, Subcommand::Build { .. }) => {1159 check_stage0("build");1160 }1161 (0, Subcommand::Check { .. }) => {1162 check_stage0("check");1163 }1164 (0, Subcommand::Doc { .. }) => {1165 check_stage0("doc");1166 }1167 (0, Subcommand::Clippy { .. }) => {1168 check_stage0("clippy");1169 }1170 (0, Subcommand::Dist) => {1171 check_stage0("dist");1172 }1173 (0, Subcommand::Install) => {1174 check_stage0("install");1175 }1176 (0, Subcommand::Test { .. }) if build_compiletest_allow_stage0 != Some(true) => {1177 eprintln!(1178 "ERROR: cannot test anything on stage 0. Use at least stage 1. If you want to run compiletest with an external stage0 toolchain, enable `build.compiletest-allow-stage0`."1179 );1180 exit!(1);1181 }1182 _ => {}1183 }11841185 if flags_compile_time_deps && !matches!(flags_cmd, Subcommand::Check { .. }) {1186 eprintln!("ERROR: Can't use --compile-time-deps with any subcommand other than check.");1187 exit!(1);1188 }11891190 if matches!(flags_cmd, Subcommand::Fix) {1191 eprintln!(1192 "WARNING: `x fix` is provided on a best-effort basis and does not support all `cargo fix` options correctly."1193 );1194 }11951196 // CI should always run stage 2 builds, unless it specifically states otherwise1197 #[cfg(not(test))]1198 if flags_stage.is_none() && ci_env.is_running_in_ci() {1199 match flags_cmd {1200 Subcommand::Test { .. }1201 | Subcommand::Miri { .. }1202 | Subcommand::Doc { .. }1203 | Subcommand::Build { .. }1204 | Subcommand::Bench { .. }1205 | Subcommand::Dist1206 | Subcommand::Install => {1207 assert_eq!(1208 stage, 2,1209 "x.py should be run with `--stage 2` on CI, but was run with `--stage {stage}`",1210 );1211 }1212 Subcommand::Clean { .. }1213 | Subcommand::Check { .. }1214 | Subcommand::Clippy { .. }1215 | Subcommand::Fix1216 | Subcommand::Run { .. }1217 | Subcommand::Setup { .. }1218 | Subcommand::Format { .. }1219 | Subcommand::Vendor { .. }1220 | Subcommand::Perf { .. } => {}1221 }1222 }12231224 let with_defaults = |debuginfo_level_specific: Option<_>| {1225 debuginfo_level_specific.or(rust_debuginfo_level).unwrap_or(1226 if rust_debug == Some(true) {1227 DebuginfoLevel::Limited1228 } else {1229 DebuginfoLevel::None1230 },1231 )1232 };12331234 let ccache = match build_ccache {1235 Some(StringOrBool::String(s)) => Some(s),1236 Some(StringOrBool::Bool(true)) => Some("ccache".to_string()),1237 _ => None,1238 };12391240 let explicit_stage_from_config = build_test_stage.is_some()1241 || build_build_stage.is_some()1242 || build_doc_stage.is_some()1243 || build_dist_stage.is_some()1244 || build_install_stage.is_some()1245 || build_check_stage.is_some()1246 || build_bench_stage.is_some();12471248 let deny_warnings = match flags_warnings {1249 Warnings::Deny => true,1250 Warnings::Warn => false,1251 Warnings::Default => rust_deny_warnings.unwrap_or(true),1252 };12531254 let gcc_ci_mode = match gcc_download_ci_gcc {1255 Some(value) => match value {1256 true => GccCiMode::DownloadFromCi,1257 false => GccCiMode::BuildLocally,1258 },1259 None => GccCiMode::default(),1260 };12611262 let targets = flags_target1263 .map(|TargetSelectionList(targets)| targets)1264 .or_else(|| {1265 build_target.map(|t| t.iter().map(|t| TargetSelection::from_user(t)).collect())1266 })1267 .unwrap_or_else(|| hosts.clone());12681269 #[allow(clippy::map_identity)]1270 let skip = flags_skip1271 .into_iter()1272 .chain(flags_exclude)1273 .chain(build_exclude.unwrap_or_default())1274 .map(|p| {1275 // Never return top-level path here as it would break `--skip`1276 // logic on rustc's internal test framework which is utilized by compiletest.1277 #[cfg(windows)]1278 {1279 PathBuf::from(p.to_string_lossy().replace('/', "\\"))1280 }1281 #[cfg(not(windows))]1282 {1283 p1284 }1285 })1286 .collect();12871288 let cargo_info = git_info(&exec_ctx, omit_git_hash, &src.join("src/tools/cargo"));1289 let clippy_info = git_info(&exec_ctx, omit_git_hash, &src.join("src/tools/clippy"));1290 let in_tree_gcc_info = git_info(&exec_ctx, false, &src.join("src/gcc"));1291 let in_tree_llvm_info = git_info(&exec_ctx, false, &src.join("src/llvm-project"));1292 let enzyme_info = git_info(&exec_ctx, omit_git_hash, &src.join("src/tools/enzyme"));1293 let miri_info = git_info(&exec_ctx, omit_git_hash, &src.join("src/tools/miri"));1294 let rust_analyzer_info =1295 git_info(&exec_ctx, omit_git_hash, &src.join("src/tools/rust-analyzer"));1296 let rustfmt_info = git_info(&exec_ctx, omit_git_hash, &src.join("src/tools/rustfmt"));12971298 let optimized_compiler_builtins =1299 build_optimized_compiler_builtins.unwrap_or(if channel == "dev" {1300 CompilerBuiltins::BuildRustOnly1301 } else {1302 CompilerBuiltins::BuildLLVMFuncs1303 });1304 let vendor = build_vendor.unwrap_or(1305 rust_info.is_from_tarball()1306 && src.join("vendor").exists()1307 && src.join(".cargo/config.toml").exists(),1308 );1309 let verbose_tests = rust_verbose_tests.unwrap_or(exec_ctx.is_verbose());13101311 let record_failed_tests_path =1312 out.join(build_record_failed_tests_path.unwrap_or_else(|| "failed-tests".to_string()));13131314 let paths = {1315 let mut paths = Vec::new();1316 if flags_cmd.rerun() {1317 paths = collect_previously_failed_tests(&record_failed_tests_path);1318 } else {1319 paths.extend(flags_paths);1320 }1321 paths1322 };13231324 Config {1325 // tidy-alphabetical-start1326 android_ndk: build_android_ndk,1327 backtrace: rust_backtrace.unwrap_or(true),1328 backtrace_on_ice: rust_backtrace_on_ice.unwrap_or(false),1329 bindir: install_bindir.map(PathBuf::from).unwrap_or("bin".into()),1330 bootstrap_cache_path: build_bootstrap_cache_path,1331 bootstrap_override_lld,1332 bypass_bootstrap_lock: flags_bypass_bootstrap_lock,1333 cargo_info,1334 cargo_native_static: build_cargo_native_static.unwrap_or(false),1335 ccache,1336 change_id: toml.change_id.inner,1337 channel,1338 ci_env,1339 clippy_info,1340 cmd: flags_cmd,1341 codegen_tests: rust_codegen_tests.unwrap_or(true),1342 color: flags_color,1343 compile_time_deps: flags_compile_time_deps,1344 compiler_docs: build_compiler_docs.unwrap_or(false),1345 compiletest_allow_stage0: build_compiletest_allow_stage0.unwrap_or(false),1346 compiletest_diff_tool: build_compiletest_diff_tool,1347 config: toml_path,1348 configure_args: build_configure_args.unwrap_or_default(),1349 control_flow_guard: rust_control_flow_guard.unwrap_or(false),1350 datadir: install_datadir.map(PathBuf::from),1351 deny_warnings,1352 description: build_description,1353 dist_compression_formats,1354 dist_compression_profile: dist_compression_profile.unwrap_or("fast".into()),1355 dist_include_mingw_linker: dist_include_mingw_linker.unwrap_or(true),1356 dist_sign_folder: dist_sign_folder.map(PathBuf::from),1357 dist_upload_addr,1358 dist_vendor: dist_vendor.unwrap_or_else(|| {1359 // If we're building from git or tarball sources, enable it by default.1360 rust_info.is_managed_git_subrepository() || rust_info.is_from_tarball()1361 }),1362 docdir: install_docdir.map(PathBuf::from),1363 docs: build_docs.unwrap_or(true),1364 docs_minification: build_docs_minification.unwrap_or(true),1365 download_rustc_commit,1366 dump_bootstrap_shims: flags_dump_bootstrap_shims,1367 ehcont_guard: rust_ehcont_guard.unwrap_or(false),1368 enable_bolt_settings: flags_enable_bolt_settings,1369 enzyme_info,1370 exec_ctx,1371 explicit_stage_from_cli: flags_stage.is_some(),1372 explicit_stage_from_config,1373 extended: build_extended.unwrap_or(false),1374 free_args: flags_free_args,1375 full_bootstrap: build_full_bootstrap.unwrap_or(false),1376 gcc_ci_mode,1377 gdb: build_gdb.map(PathBuf::from),1378 host_target,1379 hosts,1380 in_tree_gcc_info,1381 in_tree_llvm_info,1382 include_default_paths: flags_include_default_paths,1383 incremental: flags_incremental || rust_incremental == Some(true),1384 initial_cargo,1385 initial_cargo_clippy: build_cargo_clippy,1386 initial_rustc,1387 initial_rustdoc,1388 initial_rustfmt,1389 initial_sysroot,1390 jemalloc: rust_jemalloc.unwrap_or(false),1391 jobs: Some(threads_from_config(flags_jobs.or(build_jobs).unwrap_or(0))),1392 json_output: flags_json_output,1393 keep_stage: flags_keep_stage,1394 keep_stage_std: flags_keep_stage_std,1395 libdir: install_libdir.map(PathBuf::from),1396 libgccjit_libs_dir: gcc_libgccjit_libs_dir,1397 library_docs_private_items: build_library_docs_private_items.unwrap_or(false),1398 lld_enabled,1399 lldb: build_lldb.map(PathBuf::from),1400 llvm_allow_old_toolchain: llvm_allow_old_toolchain.unwrap_or(false),1401 llvm_assertions,1402 llvm_bitcode_linker_enabled: rust_llvm_bitcode_linker.unwrap_or(false),1403 llvm_build_config: llvm_build_config.clone().unwrap_or(Default::default()),1404 llvm_cflags,1405 llvm_clang: llvm_clang.unwrap_or(false),1406 llvm_clang_cl,1407 llvm_clang_dir: llvm_clang_dir.map(PathBuf::from),1408 llvm_cxxflags,1409 llvm_enable_warnings: llvm_enable_warnings.unwrap_or(false),1410 llvm_enzyme: llvm_enzyme.unwrap_or(false),1411 llvm_experimental_targets,1412 llvm_from_ci,1413 llvm_ldflags,1414 llvm_libunwind_default: rust_llvm_libunwind1415 .map(|v| v.parse().expect("failed to parse rust.llvm-libunwind")),1416 llvm_libzstd: llvm_libzstd.unwrap_or(false),1417 llvm_link_jobs,1418 // If we're building with ThinLTO on, by default we want to link1419 // to LLVM shared, to avoid re-doing ThinLTO (which happens in1420 // the link step) with each stage.1421 llvm_link_shared: Cell::new(1422 llvm_link_shared1423 .or((!llvm_from_ci && llvm_thin_lto.unwrap_or(false)).then_some(true)),1424 ),1425 llvm_offload: llvm_offload.unwrap_or(false),1426 llvm_optimize: llvm_optimize.unwrap_or(true),1427 llvm_plugins: llvm_plugin.unwrap_or(false),1428 llvm_polly: llvm_polly.unwrap_or(false),1429 llvm_profile_generate: flags_llvm_profile_generate,1430 llvm_profile_use: flags_llvm_profile_use,1431 llvm_release_debuginfo: llvm_release_debuginfo.unwrap_or(false),1432 llvm_static_stdcpp: llvm_static_libstdcpp.unwrap_or(false),1433 llvm_targets,1434 llvm_tests: llvm_tests.unwrap_or(false),1435 llvm_thin_lto: llvm_thin_lto.unwrap_or(false),1436 llvm_tools_enabled: rust_llvm_tools.unwrap_or(true),1437 llvm_use_libcxx: llvm_use_libcxx.unwrap_or(false),1438 llvm_use_linker,1439 llvm_version_suffix,1440 local_rebuild,1441 locked_deps: build_locked_deps.unwrap_or(false),1442 low_priority: build_low_priority.unwrap_or(false),1443 mandir: install_mandir.map(PathBuf::from),1444 miri_info,1445 musl_root: rust_musl_root.map(PathBuf::from),1446 ninja_in_file: llvm_ninja.unwrap_or(true),1447 nodejs: build_nodejs.map(PathBuf::from),1448 omit_git_hash,1449 on_fail: flags_on_fail,1450 optimized_compiler_builtins,1451 out,1452 patch_binaries_for_nix: build_patch_binaries_for_nix,1453 path_modification_cache,1454 paths,1455 prefix: install_prefix.map(PathBuf::from),1456 print_step_rusage: build_print_step_rusage.unwrap_or(false),1457 print_step_timings: build_print_step_timings.unwrap_or(false),1458 profiler: build_profiler.unwrap_or(false),1459 python: build_python.map(PathBuf::from),1460 quiet: flags_quiet,1461 record_failed_tests_path,1462 reproducible_artifacts: flags_reproducible_artifact,1463 reuse: build_reuse.map(PathBuf::from),1464 rust_analyzer_info,1465 rust_annotate_moves_size_limit,1466 rust_break_on_ice: rust_break_on_ice.unwrap_or(true),1467 rust_codegen_backends: rust_codegen_backends1468 .map(|backends| parse_codegen_backends(backends, "rust"))1469 .unwrap_or(vec![CodegenBackendKind::Llvm]),1470 rust_codegen_units: rust_codegen_units.map(threads_from_config),1471 rust_codegen_units_std: rust_codegen_units_std.map(threads_from_config),1472 rust_debug_logging: rust_debug_logging1473 .or(rust_rustc_debug_assertions)1474 .unwrap_or(rust_debug == Some(true)),1475 rust_debuginfo_level_rustc: with_defaults(rust_debuginfo_level_rustc),1476 rust_debuginfo_level_std: with_defaults(rust_debuginfo_level_std),1477 rust_debuginfo_level_tests: rust_debuginfo_level_tests.unwrap_or(DebuginfoLevel::None),1478 rust_debuginfo_level_tools: with_defaults(rust_debuginfo_level_tools),1479 rust_dist_src: dist_src_tarball.unwrap_or_else(|| rust_dist_src.unwrap_or(true)),1480 rust_frame_pointers: rust_frame_pointers.unwrap_or(false),1481 rust_info,1482 rust_lto: rust_lto1483 .as_deref()1484 .map(|value| RustcLto::from_str(value).unwrap())1485 .unwrap_or_default(),1486 rust_new_symbol_mangling,1487 rust_optimize: rust_optimize.unwrap_or(RustOptimize::Bool(true)),1488 rust_optimize_tests: rust_optimize_tests.unwrap_or(true),1489 rust_overflow_checks: rust_overflow_checks.unwrap_or(rust_debug == Some(true)),1490 rust_overflow_checks_std: rust_overflow_checks_std1491 .or(rust_overflow_checks)1492 .unwrap_or(rust_debug == Some(true)),1493 rust_parallel_frontend_threads: rust_parallel_frontend_threads.map(threads_from_config),1494 rust_profile_generate: flags_rust_profile_generate.or(rust_profile_generate),1495 rust_profile_use: flags_rust_profile_use.or(rust_profile_use),1496 rust_randomize_layout: rust_randomize_layout.unwrap_or(false),1497 rust_remap_debuginfo: rust_remap_debuginfo.unwrap_or(false),1498 rust_rpath: rust_rpath.unwrap_or(true),1499 rust_rustflags: rust_rustflags.unwrap_or_default(),1500 rust_stack_protector,1501 rust_std_features: rust_std_features1502 .unwrap_or(BTreeSet::from([String::from("panic-unwind")])),1503 rust_strip: rust_strip.unwrap_or(false),1504 rust_thin_lto_import_instr_limit,1505 rust_validate_mir_opts,1506 rust_verify_llvm_ir: rust_verify_llvm_ir.unwrap_or(false),1507 rustc_debug_assertions: rust_rustc_debug_assertions.unwrap_or(rust_debug == Some(true)),1508 rustc_default_linker: rust_default_linker,1509 rustc_error_format: flags_rustc_error_format,1510 rustfmt_info,1511 sanitizers: build_sanitizers.unwrap_or(false),1512 save_toolstates: rust_save_toolstates.map(PathBuf::from),1513 skip,1514 skip_std_check_if_no_download_rustc: flags_skip_std_check_if_no_download_rustc,1515 src,1516 stage,1517 stage0_metadata,1518 std_debug_assertions: rust_std_debug_assertions1519 .or(rust_rustc_debug_assertions)1520 .unwrap_or(rust_debug == Some(true)),1521 stderr_is_tty: std::io::stderr().is_terminal(),1522 stdout_is_tty: std::io::stdout().is_terminal(),1523 submodules: build_submodules,1524 sysconfdir: install_sysconfdir.map(PathBuf::from),1525 target_config,1526 targets,1527 test_compare_mode: rust_test_compare_mode.unwrap_or(false),1528 tidy_extra_checks: build_tidy_extra_checks,1529 tool: build_tool.unwrap_or_default(),1530 tools: build_tools,1531 tools_debug_assertions: rust_tools_debug_assertions1532 .or(rust_rustc_debug_assertions)1533 .unwrap_or(rust_debug == Some(true)),1534 vendor,1535 verbose_tests,1536 windows_rc: build_windows_rc.map(PathBuf::from),1537 yarn: build_yarn.map(PathBuf::from),1538 // tidy-alphabetical-end1539 }1540 }15411542 pub fn dry_run(&self) -> bool {1543 self.exec_ctx.dry_run()1544 }15451546 pub fn is_running_on_ci(&self) -> bool {1547 self.ci_env.is_running_in_ci()1548 }15491550 pub fn is_explicit_stage(&self) -> bool {1551 self.explicit_stage_from_cli || self.explicit_stage_from_config1552 }15531554 pub(crate) fn test_args(&self) -> Vec<&str> {1555 let mut test_args = match self.cmd {1556 Subcommand::Test { ref test_args, .. }1557 | Subcommand::Bench { ref test_args, .. }1558 | Subcommand::Miri { ref test_args, .. } => {1559 test_args.iter().flat_map(|s| s.split_whitespace()).collect()1560 }1561 _ => vec![],1562 };1563 test_args.extend(self.free_args.iter().map(|s| s.as_str()));1564 test_args1565 }15661567 pub(crate) fn args(&self) -> Vec<&str> {1568 let mut args = match self.cmd {1569 Subcommand::Run { ref args, .. } => {1570 args.iter().flat_map(|s| s.split_whitespace()).collect()1571 }1572 _ => vec![],1573 };1574 args.extend(self.free_args.iter().map(|s| s.as_str()));1575 args1576 }15771578 /// Returns the content of the given file at a specific commit.1579 pub(crate) fn read_file_by_commit(&self, file: &Path, commit: &str) -> String {1580 let dwn_ctx = DownloadContext::from(self);1581 read_file_by_commit(dwn_ctx, &self.rust_info, file, commit)1582 }15831584 /// Bootstrap embeds a version number into the name of shared libraries it uploads in CI.1585 /// Return the version it would have used for the given commit.1586 pub(crate) fn artifact_version_part(&self, commit: &str) -> String {1587 let (channel, version) = if self.rust_info.is_managed_git_subrepository() {1588 let channel =1589 self.read_file_by_commit(Path::new("src/ci/channel"), commit).trim().to_owned();1590 let version =1591 self.read_file_by_commit(Path::new("src/version"), commit).trim().to_owned();1592 (channel, version)1593 } else {1594 let channel = fs::read_to_string(self.src.join("src/ci/channel"));1595 let version = fs::read_to_string(self.src.join("src/version"));1596 match (channel, version) {1597 (Ok(channel), Ok(version)) => {1598 (channel.trim().to_owned(), version.trim().to_owned())1599 }1600 (channel, version) => {1601 let src = self.src.display();1602 eprintln!("ERROR: failed to determine artifact channel and/or version");1603 eprintln!(1604 "HELP: consider using a git checkout or ensure these files are readable"1605 );1606 if let Err(channel) = channel {1607 eprintln!("reading {src}/src/ci/channel failed: {channel:?}");1608 }1609 if let Err(version) = version {1610 eprintln!("reading {src}/src/version failed: {version:?}");1611 }1612 panic!();1613 }1614 }1615 };16161617 match channel.as_str() {1618 "stable" => version,1619 "beta" => channel,1620 "nightly" => channel,1621 other => unreachable!("{:?} is not recognized as a valid channel", other),1622 }1623 }16241625 /// Try to find the relative path of `bindir`, otherwise return it in full.1626 pub fn bindir_relative(&self) -> &Path {1627 let bindir = &self.bindir;1628 if bindir.is_absolute() {1629 // Try to make it relative to the prefix.1630 if let Some(prefix) = &self.prefix1631 && let Ok(stripped) = bindir.strip_prefix(prefix)1632 {1633 return stripped;1634 }1635 }1636 bindir1637 }16381639 /// Try to find the relative path of `libdir`.1640 pub fn libdir_relative(&self) -> Option<&Path> {1641 let libdir = self.libdir.as_ref()?;1642 if libdir.is_relative() {1643 Some(libdir)1644 } else {1645 // Try to make it relative to the prefix.1646 libdir.strip_prefix(self.prefix.as_ref()?).ok()1647 }1648 }16491650 /// The absolute path to the downloaded LLVM artifacts.1651 pub(crate) fn ci_llvm_root(&self) -> PathBuf {1652 let dwn_ctx = DownloadContext::from(self);1653 ci_llvm_root(dwn_ctx, self.llvm_from_ci, &self.out)1654 }16551656 /// Directory where the extracted `rustc-dev` component is stored.1657 pub(crate) fn ci_rustc_dir(&self) -> PathBuf {1658 assert!(self.download_rustc());1659 self.out.join(self.host_target).join("ci-rustc")1660 }16611662 /// Determine whether llvm should be linked dynamically.1663 ///1664 /// If `false`, llvm should be linked statically.1665 /// This is computed on demand since LLVM might have to first be downloaded from CI.1666 pub(crate) fn llvm_link_shared(&self) -> bool {1667 let mut opt = self.llvm_link_shared.get();1668 if opt.is_none() && self.dry_run() {1669 // just assume static for now - dynamic linking isn't supported on all platforms1670 return false;1671 }16721673 let llvm_link_shared = *opt.get_or_insert_with(|| {1674 if self.llvm_from_ci {1675 self.maybe_download_ci_llvm();1676 let ci_llvm = self.ci_llvm_root();1677 let link_type = t!(1678 std::fs::read_to_string(ci_llvm.join("link-type.txt")),1679 format!("CI llvm missing: {}", ci_llvm.display())1680 );1681 link_type == "dynamic"1682 } else {1683 // unclear how thought-through this default is, but it maintains compatibility with1684 // previous behavior1685 false1686 }1687 });1688 self.llvm_link_shared.set(opt);1689 llvm_link_shared1690 }16911692 /// Return whether we will use a downloaded, pre-compiled version of rustc, or just build from source.1693 pub(crate) fn download_rustc(&self) -> bool {1694 self.download_rustc_commit().is_some()1695 }16961697 pub(crate) fn download_rustc_commit(&self) -> Option<&str> {1698 static DOWNLOAD_RUSTC: OnceLock<Option<String>> = OnceLock::new();1699 if self.dry_run() && DOWNLOAD_RUSTC.get().is_none() {1700 // avoid trying to actually download the commit1701 return self.download_rustc_commit.as_deref();1702 }17031704 DOWNLOAD_RUSTC1705 .get_or_init(|| match &self.download_rustc_commit {1706 None => None,1707 Some(commit) => {1708 self.download_ci_rustc(commit);17091710 // CI-rustc can't be used without CI-LLVM. If `self.llvm_from_ci` is false, it means the "if-unchanged"1711 // logic has detected some changes in the LLVM submodule (download-ci-llvm=false can't happen here as1712 // we don't allow it while parsing the configuration).1713 if !self.llvm_from_ci {1714 // This happens when LLVM submodule is updated in CI, we should disable ci-rustc without an error1715 // to not break CI. For non-CI environments, we should return an error.1716 if self.is_running_on_ci() {1717 println!("WARNING: LLVM submodule has changes, `download-rustc` will be disabled.");1718 return None;1719 } else {1720 panic!("ERROR: LLVM submodule has changes, `download-rustc` can't be used.");1721 }1722 }17231724 if let Some(config_path) = &self.config {1725 let ci_config_toml = match self.get_builder_toml("ci-rustc") {1726 Ok(ci_config_toml) => ci_config_toml,1727 Err(e) if e.to_string().contains("unknown field") => {1728 println!("WARNING: CI rustc has some fields that are no longer supported in bootstrap; download-rustc will be disabled.");1729 println!("HELP: Consider rebasing to a newer commit if available.");1730 return None;1731 }1732 Err(e) => {1733 eprintln!("ERROR: Failed to parse CI rustc bootstrap.toml: {e}");1734 exit!(2);1735 }1736 };17371738 let current_config_toml = Self::get_toml(config_path).unwrap();17391740 // Check the config compatibility1741 // FIXME: this doesn't cover `--set` flags yet.1742 let res = check_incompatible_options_for_ci_rustc(1743 self.host_target,1744 current_config_toml,1745 ci_config_toml,1746 );17471748 // Primarily used by CI runners to avoid handling download-rustc incompatible1749 // options one by one on shell scripts.1750 let disable_ci_rustc_if_incompatible = env::var_os("DISABLE_CI_RUSTC_IF_INCOMPATIBLE")1751 .is_some_and(|s| s == "1" || s == "true");17521753 if disable_ci_rustc_if_incompatible && res.is_err() {1754 println!("WARNING: download-rustc is disabled with `DISABLE_CI_RUSTC_IF_INCOMPATIBLE` env.");1755 return None;1756 }17571758 res.unwrap();1759 }17601761 Some(commit.clone())1762 }1763 })1764 .as_deref()1765 }17661767 /// Runs a function if verbosity is greater than 01768 pub fn do_if_verbose(&self, f: impl Fn()) {1769 self.exec_ctx.do_if_verbose(f);1770 }17711772 pub fn any_sanitizers_to_build(&self) -> bool {1773 self.target_config1774 .iter()1775 .any(|(ts, t)| !ts.is_msvc() && t.sanitizers.unwrap_or(self.sanitizers))1776 }17771778 pub fn any_profiler_enabled(&self) -> bool {1779 self.target_config.values().any(|t| matches!(&t.profiler, Some(p) if p.is_string_or_true()))1780 || self.profiler1781 }17821783 /// Returns whether or not submodules should be managed by bootstrap.1784 pub fn submodules(&self) -> bool {1785 // If not specified in config, the default is to only manage1786 // submodules if we're currently inside a git repository.1787 self.submodules.unwrap_or(self.rust_info.is_managed_git_subrepository())1788 }17891790 pub fn git_config(&self) -> GitConfig<'_> {1791 GitConfig {1792 nightly_branch: &self.stage0_metadata.config.nightly_branch,1793 git_merge_commit_email: &self.stage0_metadata.config.git_merge_commit_email,1794 }1795 }17961797 /// Given a path to the directory of a submodule, update it.1798 ///1799 /// `relative_path` should be relative to the root of the git repository, not an absolute path.1800 ///1801 /// This *does not* update the submodule if `bootstrap.toml` explicitly says1802 /// not to, or if we're not in a git repository (like a plain source1803 /// tarball). Typically [`crate::Build::require_submodule`] should be1804 /// used instead to provide a nice error to the user if the submodule is1805 /// missing.1806 #[cfg_attr(1807 feature = "tracing",1808 instrument(1809 level = "trace",1810 name = "Config::update_submodule",1811 skip_all,1812 fields(relative_path = ?relative_path),1813 ),1814 )]1815 pub(crate) fn update_submodule(&self, relative_path: &str) {1816 let dwn_ctx = DownloadContext::from(self);1817 update_submodule(dwn_ctx, &self.rust_info, relative_path);1818 }18191820 /// Returns true if any of the `paths` have been modified locally.1821 pub fn has_changes_from_upstream(&self, paths: &[&'static str]) -> bool {1822 let dwn_ctx = DownloadContext::from(self);1823 has_changes_from_upstream(dwn_ctx, paths)1824 }18251826 /// Checks whether any of the given paths have been modified w.r.t. upstream.1827 pub fn check_path_modifications(&self, paths: &[&'static str]) -> PathFreshness {1828 // Checking path modifications through git can be relatively expensive (>100ms).1829 // We do not assume that the sources would change during bootstrap's execution,1830 // so we can cache the results here.1831 // Note that we do not use a static variable for the cache, because it would cause problems1832 // in tests that create separate `Config` instances.1833 self.path_modification_cache1834 .lock()1835 .unwrap()1836 .entry(paths.to_vec())1837 .or_insert_with(|| {1838 check_path_modifications(&self.src, &self.git_config(), paths, self.ci_env).unwrap()1839 })1840 .clone()1841 }18421843 pub fn sanitizers_enabled(&self, target: TargetSelection) -> bool {1844 self.target_config.get(&target).and_then(|t| t.sanitizers).unwrap_or(self.sanitizers)1845 }18461847 pub fn needs_sanitizer_runtime_built(&self, target: TargetSelection) -> bool {1848 // MSVC uses the Microsoft-provided sanitizer runtime, but all other runtimes we build.1849 !target.is_msvc() && self.sanitizers_enabled(target)1850 }18511852 pub fn profiler_path(&self, target: TargetSelection) -> Option<&str> {1853 match self.target_config.get(&target)?.profiler.as_ref()? {1854 StringOrBool::String(s) => Some(s),1855 StringOrBool::Bool(_) => None,1856 }1857 }18581859 pub fn profiler_enabled(&self, target: TargetSelection) -> bool {1860 self.target_config1861 .get(&target)1862 .and_then(|t| t.profiler.as_ref())1863 .map(StringOrBool::is_string_or_true)1864 .unwrap_or(self.profiler)1865 }18661867 /// Returns codegen backends that should be:1868 /// - Built and added to the sysroot when we build the compiler.1869 /// - Distributed when `x dist` is executed (if the codegen backend has a dist step).1870 pub fn enabled_codegen_backends(&self, target: TargetSelection) -> &[CodegenBackendKind] {1871 self.target_config1872 .get(&target)1873 .and_then(|cfg| cfg.codegen_backends.as_deref())1874 .unwrap_or(&self.rust_codegen_backends)1875 }18761877 /// Returns the codegen backend that should be configured as the *default* codegen backend1878 /// for a rustc compiled by bootstrap.1879 pub fn default_codegen_backend(&self, target: TargetSelection) -> &CodegenBackendKind {1880 // We're guaranteed to have always at least one codegen backend listed.1881 self.enabled_codegen_backends(target).first().unwrap()1882 }18831884 pub fn jemalloc(&self, target: TargetSelection) -> bool {1885 self.target_config.get(&target).and_then(|cfg| cfg.jemalloc).unwrap_or(self.jemalloc)1886 }18871888 pub fn rpath_enabled(&self, target: TargetSelection) -> bool {1889 self.target_config.get(&target).and_then(|t| t.rpath).unwrap_or(self.rust_rpath)1890 }18911892 pub fn optimized_compiler_builtins(&self, target: TargetSelection) -> &CompilerBuiltins {1893 self.target_config1894 .get(&target)1895 .and_then(|t| t.optimized_compiler_builtins.as_ref())1896 .unwrap_or(&self.optimized_compiler_builtins)1897 }18981899 pub fn llvm_enabled(&self, target: TargetSelection) -> bool {1900 self.enabled_codegen_backends(target).contains(&CodegenBackendKind::Llvm)1901 }19021903 pub fn llvm_libunwind(&self, target: TargetSelection) -> LlvmLibunwind {1904 self.target_config1905 .get(&target)1906 .and_then(|t| t.llvm_libunwind)1907 .or(self.llvm_libunwind_default)1908 .unwrap_or(1909 if target.contains("fuchsia")1910 || (target.contains("hexagon") && !target.contains("qurt"))1911 {1912 // Fuchsia and Hexagon Linux use in-tree llvm-libunwind.1913 // Hexagon QuRT uses libc_eh from the Hexagon SDK instead.1914 LlvmLibunwind::InTree1915 } else {1916 LlvmLibunwind::No1917 },1918 )1919 }19201921 pub fn split_debuginfo(&self, target: TargetSelection) -> SplitDebuginfo {1922 self.target_config1923 .get(&target)1924 .and_then(|t| t.split_debuginfo)1925 .unwrap_or_else(|| SplitDebuginfo::default_for_platform(target))1926 }19271928 /// Checks if the given target is the same as the host target.1929 pub fn is_host_target(&self, target: TargetSelection) -> bool {1930 self.host_target == target1931 }19321933 /// Returns `true` if this is an external version of LLVM not managed by bootstrap.1934 /// In particular, we expect llvm sources to be available when this is false.1935 ///1936 /// NOTE: this is not the same as `!is_rust_llvm` when `llvm_has_patches` is set.1937 pub fn is_system_llvm(&self, target: TargetSelection) -> bool {1938 is_system_llvm(&self.target_config, self.llvm_from_ci, self.host_target, target)1939 }19401941 /// Returns `true` if this is our custom, patched, version of LLVM.1942 ///1943 /// This does not necessarily imply that we're managing the `llvm-project` submodule.1944 pub fn is_rust_llvm(&self, target: TargetSelection) -> bool {1945 match self.target_config.get(&target) {1946 // We're using a user-controlled version of LLVM. The user has explicitly told us whether the version has our patches.1947 // (They might be wrong, but that's not a supported use-case.)1948 // In particular, this tries to support `submodules = false` and `patches = false`, for using a newer version of LLVM that's not through `rust-lang/llvm-project`.1949 Some(Target { llvm_has_rust_patches: Some(patched), .. }) => *patched,1950 // The user hasn't promised the patches match.1951 // This only has our patches if it's downloaded from CI or built from source.1952 _ => !self.is_system_llvm(target),1953 }1954 }19551956 pub fn exec_ctx(&self) -> &ExecutionContext {1957 &self.exec_ctx1958 }19591960 pub fn git_info(&self, omit_git_hash: bool, dir: &Path) -> GitInfo {1961 GitInfo::new(omit_git_hash, dir, self)1962 }1963}19641965impl AsRef<ExecutionContext> for Config {1966 fn as_ref(&self) -> &ExecutionContext {1967 &self.exec_ctx1968 }1969}19701971fn compute_src_directory(src_dir: Option<PathBuf>, exec_ctx: &ExecutionContext) -> Option<PathBuf> {1972 if let Some(src) = src_dir {1973 return Some(src);1974 } else {1975 // Infer the source directory. This is non-trivial because we want to support a downloaded bootstrap binary,1976 // running on a completely different machine from where it was compiled.1977 let mut cmd = helpers::git(None);1978 // NOTE: we cannot support running from outside the repository because the only other path we have available1979 // is set at compile time, which can be wrong if bootstrap was downloaded rather than compiled locally.1980 // We still support running outside the repository if we find we aren't in a git directory.19811982 // NOTE: We get a relative path from git to work around an issue on MSYS/mingw. If we used an absolute path,1983 // and end up using MSYS's git rather than git-for-windows, we would get a unix-y MSYS path. But as bootstrap1984 // has already been (kinda-cross-)compiled to Windows land, we require a normal Windows path.1985 cmd.arg("rev-parse").arg("--show-cdup");1986 // Discard stderr because we expect this to fail when building from a tarball.1987 let output = cmd.allow_failure().run_capture_stdout(exec_ctx);1988 if output.is_success() {1989 let git_root_relative = output.stdout();1990 // We need to canonicalize this path to make sure it uses backslashes instead of forward slashes,1991 // and to resolve any relative components.1992 let git_root = env::current_dir()1993 .unwrap()1994 .join(PathBuf::from(git_root_relative.trim()))1995 .canonicalize()1996 .unwrap();1997 let s = git_root.to_str().unwrap();19981999 // Bootstrap is quite bad at handling /? in front of paths2000 let git_root = match s.strip_prefix("\\\\?\\") {
Findings
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