1 //! Serialized configuration of a build.
3 //! This module implements parsing `config.toml` configuration files to tweak
4 //! how the build runs.
8 use std::collections::{HashMap, HashSet};
12 use std::path::{Path, PathBuf};
13 use std::str::FromStr;
15 use crate::builder::{Builder, TaskPath};
16 use crate::cache::{Interned, INTERNER};
17 use crate::channel::GitInfo;
18 pub use crate::flags::Subcommand;
19 use crate::flags::{Color, Flags};
20 use crate::util::{exe, t};
21 use serde::{Deserialize, Deserializer};
23 macro_rules! check_ci_llvm {
27 "setting {} is incompatible with download-ci-llvm.",
33 /// Global configuration for the entire build and/or bootstrap.
35 /// This structure is derived from a combination of both `config.toml` and
36 /// `config.mk`. As of the time of this writing it's unlikely that `config.toml`
37 /// is used all that much, so this is primarily filled out by `config.mk` which
38 /// is generated from `./configure`.
40 /// Note that this structure is not decoded directly into, but rather it is
41 /// filled out from the decoded forms of the structs below. For documentation
42 /// each field, see the corresponding fields in
43 /// `config.toml.example`.
45 #[cfg_attr(test, derive(Clone))]
47 pub changelog_seen: Option<usize>,
48 pub ccache: Option<String>,
49 /// Call Build::ninja() instead of this.
50 pub ninja_in_file: bool,
52 pub submodules: Option<bool>,
53 pub compiler_docs: bool,
54 pub docs_minification: bool,
56 pub locked_deps: bool,
58 pub target_config: HashMap<TargetSelection, Target>,
59 pub full_bootstrap: bool,
61 pub tools: Option<HashSet<String>>,
65 pub exclude: Vec<TaskPath>,
66 pub include_default_paths: bool,
67 pub rustc_error_format: Option<String>,
68 pub json_output: bool,
69 pub test_compare_mode: bool,
71 pub patch_binaries_for_nix: bool,
73 pub on_fail: Option<String>,
75 pub keep_stage: Vec<u32>,
76 pub keep_stage_std: Vec<u32>,
78 /// defaults to `config.toml`
80 pub jobs: Option<u32>,
82 pub incremental: bool,
84 pub download_rustc: bool,
86 pub deny_warnings: bool,
87 pub backtrace_on_ice: bool,
89 // llvm codegen options
90 pub llvm_skip_rebuild: bool,
91 pub llvm_assertions: bool,
93 pub llvm_plugins: bool,
94 pub llvm_optimize: bool,
95 pub llvm_thin_lto: bool,
96 pub llvm_release_debuginfo: bool,
97 pub llvm_version_check: bool,
98 pub llvm_static_stdcpp: bool,
99 /// `None` if `llvm_from_ci` is true and we haven't yet downloaded llvm.
101 llvm_link_shared: Cell<Option<bool>>,
103 pub llvm_link_shared: Cell<Option<bool>>,
104 pub llvm_clang_cl: Option<String>,
105 pub llvm_targets: Option<String>,
106 pub llvm_experimental_targets: Option<String>,
107 pub llvm_link_jobs: Option<u32>,
108 pub llvm_version_suffix: Option<String>,
109 pub llvm_use_linker: Option<String>,
110 pub llvm_allow_old_toolchain: bool,
111 pub llvm_polly: bool,
112 pub llvm_clang: bool,
113 pub llvm_from_ci: bool,
114 pub llvm_build_config: HashMap<String, String>,
117 pub lld_enabled: bool,
118 pub llvm_tools_enabled: bool,
120 pub llvm_cflags: Option<String>,
121 pub llvm_cxxflags: Option<String>,
122 pub llvm_ldflags: Option<String>,
123 pub llvm_use_libcxx: bool,
125 // rust codegen options
126 pub rust_optimize: bool,
127 pub rust_codegen_units: Option<u32>,
128 pub rust_codegen_units_std: Option<u32>,
129 pub rust_debug_assertions: bool,
130 pub rust_debug_assertions_std: bool,
131 pub rust_overflow_checks: bool,
132 pub rust_overflow_checks_std: bool,
133 pub rust_debug_logging: bool,
134 pub rust_debuginfo_level_rustc: u32,
135 pub rust_debuginfo_level_std: u32,
136 pub rust_debuginfo_level_tools: u32,
137 pub rust_debuginfo_level_tests: u32,
138 pub rust_split_debuginfo: SplitDebuginfo,
139 pub rust_rpath: bool,
140 pub rustc_parallel: bool,
141 pub rustc_default_linker: Option<String>,
142 pub rust_optimize_tests: bool,
143 pub rust_dist_src: bool,
144 pub rust_codegen_backends: Vec<Interned<String>>,
145 pub rust_verify_llvm_ir: bool,
146 pub rust_thin_lto_import_instr_limit: Option<u32>,
147 pub rust_remap_debuginfo: bool,
148 pub rust_new_symbol_mangling: Option<bool>,
149 pub rust_profile_use: Option<String>,
150 pub rust_profile_generate: Option<String>,
151 pub llvm_profile_use: Option<String>,
152 pub llvm_profile_generate: bool,
153 pub llvm_libunwind_default: Option<LlvmLibunwind>,
155 pub build: TargetSelection,
156 pub hosts: Vec<TargetSelection>,
157 pub targets: Vec<TargetSelection>,
158 pub local_rebuild: bool,
160 pub control_flow_guard: bool,
163 pub dist_sign_folder: Option<PathBuf>,
164 pub dist_upload_addr: Option<String>,
165 pub dist_compression_formats: Option<Vec<String>>,
168 pub backtrace: bool, // support for RUST_BACKTRACE
171 pub low_priority: bool,
173 pub description: Option<String>,
174 pub verbose_tests: bool,
175 pub save_toolstates: Option<PathBuf>,
176 pub print_step_timings: bool,
177 pub print_step_rusage: bool,
178 pub missing_tools: bool,
180 // Fallback musl-root for all targets
181 pub musl_root: Option<PathBuf>,
182 pub prefix: Option<PathBuf>,
183 pub sysconfdir: Option<PathBuf>,
184 pub datadir: Option<PathBuf>,
185 pub docdir: Option<PathBuf>,
187 pub libdir: Option<PathBuf>,
188 pub mandir: Option<PathBuf>,
189 pub codegen_tests: bool,
190 pub nodejs: Option<PathBuf>,
191 pub npm: Option<PathBuf>,
192 pub gdb: Option<PathBuf>,
193 pub python: Option<PathBuf>,
194 pub cargo_native_static: bool,
195 pub configure_args: Vec<String>,
197 // These are either the stage0 downloaded binaries or the locally installed ones.
198 pub initial_cargo: PathBuf,
199 pub initial_rustc: PathBuf,
200 pub initial_rustfmt: Option<PathBuf>,
204 #[derive(Debug, Clone, Copy, PartialEq)]
205 pub enum LlvmLibunwind {
211 impl Default for LlvmLibunwind {
212 fn default() -> Self {
217 impl FromStr for LlvmLibunwind {
220 fn from_str(value: &str) -> Result<Self, Self::Err> {
222 "no" => Ok(Self::No),
223 "in-tree" => Ok(Self::InTree),
224 "system" => Ok(Self::System),
225 invalid => Err(format!("Invalid value '{}' for rust.llvm-libunwind config.", invalid)),
230 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
231 pub enum SplitDebuginfo {
237 impl Default for SplitDebuginfo {
238 fn default() -> Self {
243 impl std::str::FromStr for SplitDebuginfo {
246 fn from_str(s: &str) -> Result<Self, Self::Err> {
248 "packed" => Ok(SplitDebuginfo::Packed),
249 "unpacked" => Ok(SplitDebuginfo::Unpacked),
250 "off" => Ok(SplitDebuginfo::Off),
256 impl SplitDebuginfo {
257 /// Returns the default `-Csplit-debuginfo` value for the current target. See the comment for
258 /// `rust.split-debuginfo` in `config.toml.example`.
259 fn default_for_platform(target: &str) -> Self {
260 if target.contains("apple") {
261 SplitDebuginfo::Unpacked
262 } else if target.contains("windows") {
263 SplitDebuginfo::Packed
270 #[derive(Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
271 pub struct TargetSelection {
272 pub triple: Interned<String>,
273 file: Option<Interned<String>>,
276 impl TargetSelection {
277 pub fn from_user(selection: &str) -> Self {
278 let path = Path::new(selection);
280 let (triple, file) = if path.exists() {
283 .expect("Target specification file has no file stem")
285 .expect("Target specification file stem is not UTF-8");
287 (triple, Some(selection))
292 let triple = INTERNER.intern_str(triple);
293 let file = file.map(|f| INTERNER.intern_str(f));
295 Self { triple, file }
298 pub fn rustc_target_arg(&self) -> &str {
299 self.file.as_ref().unwrap_or(&self.triple)
302 pub fn contains(&self, needle: &str) -> bool {
303 self.triple.contains(needle)
306 pub fn starts_with(&self, needle: &str) -> bool {
307 self.triple.starts_with(needle)
310 pub fn ends_with(&self, needle: &str) -> bool {
311 self.triple.ends_with(needle)
315 impl fmt::Display for TargetSelection {
316 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
317 write!(f, "{}", self.triple)?;
318 if let Some(file) = self.file {
319 write!(f, "({})", file)?;
325 impl fmt::Debug for TargetSelection {
326 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
327 write!(f, "{}", self)
331 impl PartialEq<&str> for TargetSelection {
332 fn eq(&self, other: &&str) -> bool {
333 self.triple == *other
337 /// Per-target configuration stored in the global configuration structure.
339 #[cfg_attr(test, derive(Clone))]
341 /// Some(path to llvm-config) if using an external LLVM.
342 pub llvm_config: Option<PathBuf>,
343 /// Some(path to FileCheck) if one was specified.
344 pub llvm_filecheck: Option<PathBuf>,
345 pub llvm_libunwind: Option<LlvmLibunwind>,
346 pub cc: Option<PathBuf>,
347 pub cxx: Option<PathBuf>,
348 pub ar: Option<PathBuf>,
349 pub ranlib: Option<PathBuf>,
350 pub default_linker: Option<PathBuf>,
351 pub linker: Option<PathBuf>,
352 pub ndk: Option<PathBuf>,
353 pub sanitizers: Option<bool>,
354 pub profiler: Option<bool>,
355 pub crt_static: Option<bool>,
356 pub musl_root: Option<PathBuf>,
357 pub musl_libdir: Option<PathBuf>,
358 pub wasi_root: Option<PathBuf>,
359 pub qemu_rootfs: Option<PathBuf>,
364 pub fn from_triple(triple: &str) -> Self {
365 let mut target: Self = Default::default();
366 if triple.contains("-none") || triple.contains("nvptx") {
367 target.no_std = true;
372 /// Structure of the `config.toml` file that configuration is read from.
374 /// This structure uses `Decodable` to automatically decode a TOML configuration
375 /// file into this format, and then this is traversed and written into the above
376 /// `Config` structure.
377 #[derive(Deserialize, Default)]
378 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
380 changelog_seen: Option<usize>,
381 build: Option<Build>,
382 install: Option<Install>,
385 target: Option<HashMap<String, TomlTarget>>,
387 profile: Option<String>,
391 fn merge(&mut self, other: Self);
394 impl Merge for TomlConfig {
397 TomlConfig { build, install, llvm, rust, dist, target, profile: _, changelog_seen: _ }: Self,
399 fn do_merge<T: Merge>(x: &mut Option<T>, y: Option<T>) {
400 if let Some(new) = y {
401 if let Some(original) = x {
408 do_merge(&mut self.build, build);
409 do_merge(&mut self.install, install);
410 do_merge(&mut self.llvm, llvm);
411 do_merge(&mut self.rust, rust);
412 do_merge(&mut self.dist, dist);
413 assert!(target.is_none(), "merging target-specific config is not currently supported");
417 // We are using a decl macro instead of a derive proc macro here to reduce the compile time of
419 macro_rules! define_config {
420 ($(#[$attr:meta])* struct $name:ident {
421 $($field:ident: Option<$field_ty:ty> = $field_key:literal,)*
425 $($field: Option<$field_ty>,)*
428 impl Merge for $name {
429 fn merge(&mut self, other: Self) {
431 if !self.$field.is_some() {
432 self.$field = other.$field;
438 // The following is a trimmed version of what serde_derive generates. All parts not relevant
439 // for toml deserialization have been removed. This reduces the binary size and improves
440 // compile time of rustbuild.
441 impl<'de> Deserialize<'de> for $name {
442 fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
444 D: Deserializer<'de>,
447 impl<'de> serde::de::Visitor<'de> for Field {
449 fn expecting(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
450 f.write_str(concat!("struct ", stringify!($name)))
454 fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
456 A: serde::de::MapAccess<'de>,
458 $(let mut $field: Option<$field_ty> = None;)*
459 while let Some(key) =
460 match serde::de::MapAccess::next_key::<String>(&mut map) {
469 if $field.is_some() {
470 return Err(<A::Error as serde::de::Error>::duplicate_field(
474 $field = match serde::de::MapAccess::next_value::<$field_ty>(
477 Ok(val) => Some(val),
484 return Err(serde::de::Error::unknown_field(key, FIELDS));
488 Ok($name { $($field),* })
491 const FIELDS: &'static [&'static str] = &[
494 Deserializer::deserialize_struct(
506 /// TOML representation of various global build decisions.
509 build: Option<String> = "build",
510 host: Option<Vec<String>> = "host",
511 target: Option<Vec<String>> = "target",
512 build_dir: Option<String> = "build-dir",
513 cargo: Option<String> = "cargo",
514 rustc: Option<String> = "rustc",
515 rustfmt: Option<PathBuf> = "rustfmt",
516 docs: Option<bool> = "docs",
517 compiler_docs: Option<bool> = "compiler-docs",
518 docs_minification: Option<bool> = "docs-minification",
519 submodules: Option<bool> = "submodules",
520 gdb: Option<String> = "gdb",
521 nodejs: Option<String> = "nodejs",
522 npm: Option<String> = "npm",
523 python: Option<String> = "python",
524 locked_deps: Option<bool> = "locked-deps",
525 vendor: Option<bool> = "vendor",
526 full_bootstrap: Option<bool> = "full-bootstrap",
527 extended: Option<bool> = "extended",
528 tools: Option<HashSet<String>> = "tools",
529 verbose: Option<usize> = "verbose",
530 sanitizers: Option<bool> = "sanitizers",
531 profiler: Option<bool> = "profiler",
532 cargo_native_static: Option<bool> = "cargo-native-static",
533 low_priority: Option<bool> = "low-priority",
534 configure_args: Option<Vec<String>> = "configure-args",
535 local_rebuild: Option<bool> = "local-rebuild",
536 print_step_timings: Option<bool> = "print-step-timings",
537 print_step_rusage: Option<bool> = "print-step-rusage",
538 check_stage: Option<u32> = "check-stage",
539 doc_stage: Option<u32> = "doc-stage",
540 build_stage: Option<u32> = "build-stage",
541 test_stage: Option<u32> = "test-stage",
542 install_stage: Option<u32> = "install-stage",
543 dist_stage: Option<u32> = "dist-stage",
544 bench_stage: Option<u32> = "bench-stage",
545 patch_binaries_for_nix: Option<bool> = "patch-binaries-for-nix",
550 /// TOML representation of various global install decisions.
552 prefix: Option<String> = "prefix",
553 sysconfdir: Option<String> = "sysconfdir",
554 docdir: Option<String> = "docdir",
555 bindir: Option<String> = "bindir",
556 libdir: Option<String> = "libdir",
557 mandir: Option<String> = "mandir",
558 datadir: Option<String> = "datadir",
563 /// TOML representation of how the LLVM build is configured.
565 skip_rebuild: Option<bool> = "skip-rebuild",
566 optimize: Option<bool> = "optimize",
567 thin_lto: Option<bool> = "thin-lto",
568 release_debuginfo: Option<bool> = "release-debuginfo",
569 assertions: Option<bool> = "assertions",
570 tests: Option<bool> = "tests",
571 plugins: Option<bool> = "plugins",
572 ccache: Option<StringOrBool> = "ccache",
573 version_check: Option<bool> = "version-check",
574 static_libstdcpp: Option<bool> = "static-libstdcpp",
575 ninja: Option<bool> = "ninja",
576 targets: Option<String> = "targets",
577 experimental_targets: Option<String> = "experimental-targets",
578 link_jobs: Option<u32> = "link-jobs",
579 link_shared: Option<bool> = "link-shared",
580 version_suffix: Option<String> = "version-suffix",
581 clang_cl: Option<String> = "clang-cl",
582 cflags: Option<String> = "cflags",
583 cxxflags: Option<String> = "cxxflags",
584 ldflags: Option<String> = "ldflags",
585 use_libcxx: Option<bool> = "use-libcxx",
586 use_linker: Option<String> = "use-linker",
587 allow_old_toolchain: Option<bool> = "allow-old-toolchain",
588 polly: Option<bool> = "polly",
589 clang: Option<bool> = "clang",
590 download_ci_llvm: Option<StringOrBool> = "download-ci-llvm",
591 build_config: Option<HashMap<String, String>> = "build-config",
597 sign_folder: Option<String> = "sign-folder",
598 gpg_password_file: Option<String> = "gpg-password-file",
599 upload_addr: Option<String> = "upload-addr",
600 src_tarball: Option<bool> = "src-tarball",
601 missing_tools: Option<bool> = "missing-tools",
602 compression_formats: Option<Vec<String>> = "compression-formats",
606 #[derive(Deserialize)]
613 impl Default for StringOrBool {
614 fn default() -> StringOrBool {
615 StringOrBool::Bool(false)
620 /// TOML representation of how the Rust build is configured.
622 optimize: Option<bool> = "optimize",
623 debug: Option<bool> = "debug",
624 codegen_units: Option<u32> = "codegen-units",
625 codegen_units_std: Option<u32> = "codegen-units-std",
626 debug_assertions: Option<bool> = "debug-assertions",
627 debug_assertions_std: Option<bool> = "debug-assertions-std",
628 overflow_checks: Option<bool> = "overflow-checks",
629 overflow_checks_std: Option<bool> = "overflow-checks-std",
630 debug_logging: Option<bool> = "debug-logging",
631 debuginfo_level: Option<u32> = "debuginfo-level",
632 debuginfo_level_rustc: Option<u32> = "debuginfo-level-rustc",
633 debuginfo_level_std: Option<u32> = "debuginfo-level-std",
634 debuginfo_level_tools: Option<u32> = "debuginfo-level-tools",
635 debuginfo_level_tests: Option<u32> = "debuginfo-level-tests",
636 split_debuginfo: Option<String> = "split-debuginfo",
637 run_dsymutil: Option<bool> = "run-dsymutil",
638 backtrace: Option<bool> = "backtrace",
639 incremental: Option<bool> = "incremental",
640 parallel_compiler: Option<bool> = "parallel-compiler",
641 default_linker: Option<String> = "default-linker",
642 channel: Option<String> = "channel",
643 description: Option<String> = "description",
644 musl_root: Option<String> = "musl-root",
645 rpath: Option<bool> = "rpath",
646 verbose_tests: Option<bool> = "verbose-tests",
647 optimize_tests: Option<bool> = "optimize-tests",
648 codegen_tests: Option<bool> = "codegen-tests",
649 ignore_git: Option<bool> = "ignore-git",
650 dist_src: Option<bool> = "dist-src",
651 save_toolstates: Option<String> = "save-toolstates",
652 codegen_backends: Option<Vec<String>> = "codegen-backends",
653 lld: Option<bool> = "lld",
654 use_lld: Option<bool> = "use-lld",
655 llvm_tools: Option<bool> = "llvm-tools",
656 deny_warnings: Option<bool> = "deny-warnings",
657 backtrace_on_ice: Option<bool> = "backtrace-on-ice",
658 verify_llvm_ir: Option<bool> = "verify-llvm-ir",
659 thin_lto_import_instr_limit: Option<u32> = "thin-lto-import-instr-limit",
660 remap_debuginfo: Option<bool> = "remap-debuginfo",
661 jemalloc: Option<bool> = "jemalloc",
662 test_compare_mode: Option<bool> = "test-compare-mode",
663 llvm_libunwind: Option<String> = "llvm-libunwind",
664 control_flow_guard: Option<bool> = "control-flow-guard",
665 new_symbol_mangling: Option<bool> = "new-symbol-mangling",
666 profile_generate: Option<String> = "profile-generate",
667 profile_use: Option<String> = "profile-use",
668 // ignored; this is set from an env var set by bootstrap.py
669 download_rustc: Option<StringOrBool> = "download-rustc",
674 /// TOML representation of how each build target is configured.
676 cc: Option<String> = "cc",
677 cxx: Option<String> = "cxx",
678 ar: Option<String> = "ar",
679 ranlib: Option<String> = "ranlib",
680 default_linker: Option<PathBuf> = "default-linker",
681 linker: Option<String> = "linker",
682 llvm_config: Option<String> = "llvm-config",
683 llvm_filecheck: Option<String> = "llvm-filecheck",
684 llvm_libunwind: Option<String> = "llvm-libunwind",
685 android_ndk: Option<String> = "android-ndk",
686 sanitizers: Option<bool> = "sanitizers",
687 profiler: Option<bool> = "profiler",
688 crt_static: Option<bool> = "crt-static",
689 musl_root: Option<String> = "musl-root",
690 musl_libdir: Option<String> = "musl-libdir",
691 wasi_root: Option<String> = "wasi-root",
692 qemu_rootfs: Option<String> = "qemu-rootfs",
693 no_std: Option<bool> = "no-std",
698 pub fn default_opts() -> Config {
699 let mut config = Config::default();
700 config.llvm_optimize = true;
701 config.ninja_in_file = true;
702 config.llvm_version_check = true;
703 config.llvm_static_stdcpp = true;
704 config.backtrace = true;
705 config.rust_optimize = true;
706 config.rust_optimize_tests = true;
707 config.submodules = None;
709 config.docs_minification = true;
710 config.rust_rpath = true;
711 config.channel = "dev".to_string();
712 config.codegen_tests = true;
713 config.rust_dist_src = true;
714 config.rust_codegen_backends = vec![INTERNER.intern_str("llvm")];
715 config.deny_warnings = true;
716 config.bindir = "bin".into();
719 config.build = TargetSelection::from_user(&env!("BUILD_TRIPLE"));
720 let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
721 // Undo `src/bootstrap`
722 config.src = manifest_dir.parent().unwrap().parent().unwrap().to_owned();
723 config.out = PathBuf::from("build");
725 config.initial_cargo = PathBuf::from(env!("CARGO"));
726 config.initial_rustc = PathBuf::from(env!("RUSTC"));
731 pub fn parse(args: &[String]) -> Config {
732 let flags = Flags::parse(&args);
734 let mut config = Config::default_opts();
735 config.exclude = flags.exclude.into_iter().map(|path| TaskPath::parse(path)).collect();
736 config.include_default_paths = flags.include_default_paths;
737 config.rustc_error_format = flags.rustc_error_format;
738 config.json_output = flags.json_output;
739 config.on_fail = flags.on_fail;
740 config.jobs = flags.jobs.map(threads_from_config);
741 config.cmd = flags.cmd;
742 config.incremental = flags.incremental;
743 config.dry_run = flags.dry_run;
744 config.keep_stage = flags.keep_stage;
745 config.keep_stage_std = flags.keep_stage_std;
746 config.color = flags.color;
747 if let Some(value) = flags.deny_warnings {
748 config.deny_warnings = value;
750 config.llvm_profile_use = flags.llvm_profile_use;
751 config.llvm_profile_generate = flags.llvm_profile_generate;
754 let get_toml = |_| TomlConfig::default();
756 let get_toml = |file: &Path| {
760 t!(fs::read_to_string(file), format!("config file {} not found", file.display()));
761 // Deserialize to Value and then TomlConfig to prevent the Deserialize impl of
762 // TomlConfig and sub types to be monomorphized 5x by toml.
763 match toml::from_str(&contents)
764 .and_then(|table: toml::Value| TomlConfig::deserialize(table))
768 println!("failed to parse TOML configuration '{}': {}", file.display(), err);
774 // Read from `--config`, then `RUST_BOOTSTRAP_CONFIG`, then `./config.toml`, then `config.toml` in the root directory.
775 let toml_path = flags
778 .or_else(|| env::var_os("RUST_BOOTSTRAP_CONFIG").map(PathBuf::from));
779 let using_default_path = toml_path.is_none();
780 let mut toml_path = toml_path.unwrap_or_else(|| PathBuf::from("config.toml"));
781 if using_default_path && !toml_path.exists() {
782 toml_path = config.src.join(toml_path);
785 // Give a hard error if `--config` or `RUST_BOOTSTRAP_CONFIG` are set to a missing path,
786 // but not if `config.toml` hasn't been created.
787 let mut toml = if !using_default_path || toml_path.exists() {
790 TomlConfig::default()
793 if let Some(include) = &toml.profile {
794 let mut include_path = config.src.clone();
795 include_path.push("src");
796 include_path.push("bootstrap");
797 include_path.push("defaults");
798 include_path.push(format!("config.{}.toml", include));
799 let included_toml = get_toml(&include_path);
800 toml.merge(included_toml);
803 config.changelog_seen = toml.changelog_seen;
804 config.config = toml_path;
806 let build = toml.build.unwrap_or_default();
808 set(&mut config.initial_rustc, build.rustc.map(PathBuf::from));
809 set(&mut config.out, build.build_dir.map(PathBuf::from));
810 // NOTE: Bootstrap spawns various commands with different working directories.
811 // To avoid writing to random places on the file system, `config.out` needs to be an absolute path.
812 if !config.out.is_absolute() {
813 // `canonicalize` requires the path to already exist. Use our vendored copy of `absolute` instead.
814 config.out = crate::util::absolute(&config.out);
818 let dir = config.out.join("tmp-dry-run");
819 t!(fs::create_dir_all(&dir));
823 config.hosts = if let Some(arg_host) = flags.host {
825 } else if let Some(file_host) = build.host {
826 file_host.iter().map(|h| TargetSelection::from_user(h)).collect()
830 config.targets = if let Some(arg_target) = flags.target {
832 } else if let Some(file_target) = build.target {
833 file_target.iter().map(|h| TargetSelection::from_user(h)).collect()
835 // If target is *not* configured, then default to the host
840 config.nodejs = build.nodejs.map(PathBuf::from);
841 config.npm = build.npm.map(PathBuf::from);
842 config.gdb = build.gdb.map(PathBuf::from);
843 config.python = build.python.map(PathBuf::from);
844 config.submodules = build.submodules;
845 set(&mut config.low_priority, build.low_priority);
846 set(&mut config.compiler_docs, build.compiler_docs);
847 set(&mut config.docs_minification, build.docs_minification);
848 set(&mut config.docs, build.docs);
849 set(&mut config.locked_deps, build.locked_deps);
850 set(&mut config.vendor, build.vendor);
851 set(&mut config.full_bootstrap, build.full_bootstrap);
852 set(&mut config.extended, build.extended);
853 config.tools = build.tools;
854 if build.rustfmt.is_some() {
855 config.initial_rustfmt = build.rustfmt;
857 set(&mut config.verbose, build.verbose);
858 set(&mut config.sanitizers, build.sanitizers);
859 set(&mut config.profiler, build.profiler);
860 set(&mut config.cargo_native_static, build.cargo_native_static);
861 set(&mut config.configure_args, build.configure_args);
862 set(&mut config.local_rebuild, build.local_rebuild);
863 set(&mut config.print_step_timings, build.print_step_timings);
864 set(&mut config.print_step_rusage, build.print_step_rusage);
865 set(&mut config.patch_binaries_for_nix, build.patch_binaries_for_nix);
867 config.verbose = cmp::max(config.verbose, flags.verbose);
869 if let Some(install) = toml.install {
870 config.prefix = install.prefix.map(PathBuf::from);
871 config.sysconfdir = install.sysconfdir.map(PathBuf::from);
872 config.datadir = install.datadir.map(PathBuf::from);
873 config.docdir = install.docdir.map(PathBuf::from);
874 set(&mut config.bindir, install.bindir.map(PathBuf::from));
875 config.libdir = install.libdir.map(PathBuf::from);
876 config.mandir = install.mandir.map(PathBuf::from);
879 // We want the llvm-skip-rebuild flag to take precedence over the
880 // skip-rebuild config.toml option so we store it separately
881 // so that we can infer the right value
882 let mut llvm_skip_rebuild = flags.llvm_skip_rebuild;
884 // Store off these values as options because if they're not provided
885 // we'll infer default values for them later
886 let mut llvm_assertions = None;
887 let mut llvm_tests = None;
888 let mut llvm_plugins = None;
889 let mut debug = None;
890 let mut debug_assertions = None;
891 let mut debug_assertions_std = None;
892 let mut overflow_checks = None;
893 let mut overflow_checks_std = None;
894 let mut debug_logging = None;
895 let mut debuginfo_level = None;
896 let mut debuginfo_level_rustc = None;
897 let mut debuginfo_level_std = None;
898 let mut debuginfo_level_tools = None;
899 let mut debuginfo_level_tests = None;
900 let mut optimize = None;
901 let mut ignore_git = None;
903 if let Some(llvm) = toml.llvm {
905 Some(StringOrBool::String(ref s)) => config.ccache = Some(s.to_string()),
906 Some(StringOrBool::Bool(true)) => {
907 config.ccache = Some("ccache".to_string());
909 Some(StringOrBool::Bool(false)) | None => {}
911 set(&mut config.ninja_in_file, llvm.ninja);
912 llvm_assertions = llvm.assertions;
913 llvm_tests = llvm.tests;
914 llvm_plugins = llvm.plugins;
915 llvm_skip_rebuild = llvm_skip_rebuild.or(llvm.skip_rebuild);
916 set(&mut config.llvm_optimize, llvm.optimize);
917 set(&mut config.llvm_thin_lto, llvm.thin_lto);
918 set(&mut config.llvm_release_debuginfo, llvm.release_debuginfo);
919 set(&mut config.llvm_version_check, llvm.version_check);
920 set(&mut config.llvm_static_stdcpp, llvm.static_libstdcpp);
921 if let Some(v) = llvm.link_shared {
922 config.llvm_link_shared.set(Some(v));
924 config.llvm_targets = llvm.targets.clone();
925 config.llvm_experimental_targets = llvm.experimental_targets.clone();
926 config.llvm_link_jobs = llvm.link_jobs;
927 config.llvm_version_suffix = llvm.version_suffix.clone();
928 config.llvm_clang_cl = llvm.clang_cl.clone();
930 config.llvm_cflags = llvm.cflags.clone();
931 config.llvm_cxxflags = llvm.cxxflags.clone();
932 config.llvm_ldflags = llvm.ldflags.clone();
933 set(&mut config.llvm_use_libcxx, llvm.use_libcxx);
934 config.llvm_use_linker = llvm.use_linker.clone();
935 config.llvm_allow_old_toolchain = llvm.allow_old_toolchain.unwrap_or(false);
936 config.llvm_polly = llvm.polly.unwrap_or(false);
937 config.llvm_clang = llvm.clang.unwrap_or(false);
938 config.llvm_build_config = llvm.build_config.clone().unwrap_or(Default::default());
939 config.llvm_from_ci = match llvm.download_ci_llvm {
940 Some(StringOrBool::String(s)) => {
941 assert!(s == "if-available", "unknown option `{}` for download-ci-llvm", s);
942 // This is currently all tier 1 targets and tier 2 targets with host tools
943 // (since others may not have CI artifacts)
944 // https://doc.rust-lang.org/rustc/platform-support.html#tier-1
945 // FIXME: this is duplicated in bootstrap.py
946 let supported_platforms = [
948 "aarch64-unknown-linux-gnu",
949 "i686-pc-windows-gnu",
950 "i686-pc-windows-msvc",
951 "i686-unknown-linux-gnu",
952 "x86_64-unknown-linux-gnu",
953 "x86_64-apple-darwin",
954 "x86_64-pc-windows-gnu",
955 "x86_64-pc-windows-msvc",
956 // tier 2 with host tools
957 "aarch64-apple-darwin",
958 "aarch64-pc-windows-msvc",
959 "aarch64-unknown-linux-musl",
960 "arm-unknown-linux-gnueabi",
961 "arm-unknown-linux-gnueabihf",
962 "armv7-unknown-linux-gnueabihf",
963 "mips-unknown-linux-gnu",
964 "mips64-unknown-linux-gnuabi64",
965 "mips64el-unknown-linux-gnuabi64",
966 "mipsel-unknown-linux-gnu",
967 "powerpc-unknown-linux-gnu",
968 "powerpc64-unknown-linux-gnu",
969 "powerpc64le-unknown-linux-gnu",
970 "riscv64gc-unknown-linux-gnu",
971 "s390x-unknown-linux-gnu",
972 "x86_64-unknown-freebsd",
973 "x86_64-unknown-illumos",
974 "x86_64-unknown-linux-musl",
975 "x86_64-unknown-netbsd",
977 supported_platforms.contains(&&*config.build.triple)
979 Some(StringOrBool::Bool(b)) => b,
983 if config.llvm_from_ci {
984 // None of the LLVM options, except assertions, are supported
985 // when using downloaded LLVM. We could just ignore these but
986 // that's potentially confusing, so force them to not be
987 // explicitly set. The defaults and CI defaults don't
988 // necessarily match but forcing people to match (somewhat
989 // arbitrary) CI configuration locally seems bad/hard.
990 check_ci_llvm!(llvm.optimize);
991 check_ci_llvm!(llvm.thin_lto);
992 check_ci_llvm!(llvm.release_debuginfo);
993 // CI-built LLVM can be either dynamic or static. We won't know until we download it.
994 check_ci_llvm!(llvm.link_shared);
995 check_ci_llvm!(llvm.static_libstdcpp);
996 check_ci_llvm!(llvm.targets);
997 check_ci_llvm!(llvm.experimental_targets);
998 check_ci_llvm!(llvm.link_jobs);
999 check_ci_llvm!(llvm.clang_cl);
1000 check_ci_llvm!(llvm.version_suffix);
1001 check_ci_llvm!(llvm.cflags);
1002 check_ci_llvm!(llvm.cxxflags);
1003 check_ci_llvm!(llvm.ldflags);
1004 check_ci_llvm!(llvm.use_libcxx);
1005 check_ci_llvm!(llvm.use_linker);
1006 check_ci_llvm!(llvm.allow_old_toolchain);
1007 check_ci_llvm!(llvm.polly);
1008 check_ci_llvm!(llvm.clang);
1009 check_ci_llvm!(llvm.build_config);
1010 check_ci_llvm!(llvm.plugins);
1013 // NOTE: can never be hit when downloading from CI, since we call `check_ci_llvm!(thin_lto)` above.
1014 if config.llvm_thin_lto && llvm.link_shared.is_none() {
1015 // If we're building with ThinLTO on, by default we want to link
1016 // to LLVM shared, to avoid re-doing ThinLTO (which happens in
1017 // the link step) with each stage.
1018 config.llvm_link_shared.set(Some(true));
1022 if let Some(rust) = toml.rust {
1024 debug_assertions = rust.debug_assertions;
1025 debug_assertions_std = rust.debug_assertions_std;
1026 overflow_checks = rust.overflow_checks;
1027 overflow_checks_std = rust.overflow_checks_std;
1028 debug_logging = rust.debug_logging;
1029 debuginfo_level = rust.debuginfo_level;
1030 debuginfo_level_rustc = rust.debuginfo_level_rustc;
1031 debuginfo_level_std = rust.debuginfo_level_std;
1032 debuginfo_level_tools = rust.debuginfo_level_tools;
1033 debuginfo_level_tests = rust.debuginfo_level_tests;
1034 config.rust_split_debuginfo = rust
1037 .map(SplitDebuginfo::from_str)
1038 .map(|v| v.expect("invalid value for rust.split_debuginfo"))
1039 .unwrap_or(SplitDebuginfo::default_for_platform(&config.build.triple));
1040 optimize = rust.optimize;
1041 ignore_git = rust.ignore_git;
1042 config.rust_new_symbol_mangling = rust.new_symbol_mangling;
1043 set(&mut config.rust_optimize_tests, rust.optimize_tests);
1044 set(&mut config.codegen_tests, rust.codegen_tests);
1045 set(&mut config.rust_rpath, rust.rpath);
1046 set(&mut config.jemalloc, rust.jemalloc);
1047 set(&mut config.test_compare_mode, rust.test_compare_mode);
1048 set(&mut config.backtrace, rust.backtrace);
1049 set(&mut config.channel, rust.channel);
1050 config.description = rust.description;
1051 set(&mut config.rust_dist_src, rust.dist_src);
1052 set(&mut config.verbose_tests, rust.verbose_tests);
1053 // in the case "false" is set explicitly, do not overwrite the command line args
1054 if let Some(true) = rust.incremental {
1055 config.incremental = true;
1057 set(&mut config.use_lld, rust.use_lld);
1058 set(&mut config.lld_enabled, rust.lld);
1059 set(&mut config.llvm_tools_enabled, rust.llvm_tools);
1060 config.rustc_parallel = rust.parallel_compiler.unwrap_or(false);
1061 config.rustc_default_linker = rust.default_linker;
1062 config.musl_root = rust.musl_root.map(PathBuf::from);
1063 config.save_toolstates = rust.save_toolstates.map(PathBuf::from);
1064 set(&mut config.deny_warnings, flags.deny_warnings.or(rust.deny_warnings));
1065 set(&mut config.backtrace_on_ice, rust.backtrace_on_ice);
1066 set(&mut config.rust_verify_llvm_ir, rust.verify_llvm_ir);
1067 config.rust_thin_lto_import_instr_limit = rust.thin_lto_import_instr_limit;
1068 set(&mut config.rust_remap_debuginfo, rust.remap_debuginfo);
1069 set(&mut config.control_flow_guard, rust.control_flow_guard);
1070 config.llvm_libunwind_default = rust
1072 .map(|v| v.parse().expect("failed to parse rust.llvm-libunwind"));
1074 if let Some(ref backends) = rust.codegen_backends {
1075 config.rust_codegen_backends =
1076 backends.iter().map(|s| INTERNER.intern_str(s)).collect();
1079 config.rust_codegen_units = rust.codegen_units.map(threads_from_config);
1080 config.rust_codegen_units_std = rust.codegen_units_std.map(threads_from_config);
1081 config.rust_profile_use = flags.rust_profile_use.or(rust.profile_use);
1082 config.rust_profile_generate = flags.rust_profile_generate.or(rust.profile_generate);
1083 config.download_rustc = env::var("BOOTSTRAP_DOWNLOAD_RUSTC").as_deref() == Ok("1");
1085 config.rust_profile_use = flags.rust_profile_use;
1086 config.rust_profile_generate = flags.rust_profile_generate;
1089 if let Some(t) = toml.target {
1090 for (triple, cfg) in t {
1091 let mut target = Target::from_triple(&triple);
1093 if let Some(ref s) = cfg.llvm_config {
1094 target.llvm_config = Some(config.src.join(s));
1096 if let Some(ref s) = cfg.llvm_filecheck {
1097 target.llvm_filecheck = Some(config.src.join(s));
1099 target.llvm_libunwind = cfg
1102 .map(|v| v.parse().expect("failed to parse rust.llvm-libunwind"));
1103 if let Some(ref s) = cfg.android_ndk {
1104 target.ndk = Some(config.src.join(s));
1106 if let Some(s) = cfg.no_std {
1109 target.cc = cfg.cc.map(PathBuf::from);
1110 target.cxx = cfg.cxx.map(PathBuf::from);
1111 target.ar = cfg.ar.map(PathBuf::from);
1112 target.ranlib = cfg.ranlib.map(PathBuf::from);
1113 target.linker = cfg.linker.map(PathBuf::from);
1114 target.crt_static = cfg.crt_static;
1115 target.musl_root = cfg.musl_root.map(PathBuf::from);
1116 target.musl_libdir = cfg.musl_libdir.map(PathBuf::from);
1117 target.wasi_root = cfg.wasi_root.map(PathBuf::from);
1118 target.qemu_rootfs = cfg.qemu_rootfs.map(PathBuf::from);
1119 target.sanitizers = cfg.sanitizers;
1120 target.profiler = cfg.profiler;
1122 config.target_config.insert(TargetSelection::from_user(&triple), target);
1126 if config.llvm_from_ci {
1127 let triple = &config.build.triple;
1128 let mut build_target = config
1130 .entry(config.build)
1131 .or_insert_with(|| Target::from_triple(&triple));
1133 check_ci_llvm!(build_target.llvm_config);
1134 check_ci_llvm!(build_target.llvm_filecheck);
1135 let ci_llvm_bin = config.out.join(&*config.build.triple).join("ci-llvm/bin");
1136 build_target.llvm_config = Some(ci_llvm_bin.join(exe("llvm-config", config.build)));
1137 build_target.llvm_filecheck = Some(ci_llvm_bin.join(exe("FileCheck", config.build)));
1140 if let Some(t) = toml.dist {
1141 config.dist_sign_folder = t.sign_folder.map(PathBuf::from);
1142 config.dist_upload_addr = t.upload_addr;
1143 config.dist_compression_formats = t.compression_formats;
1144 set(&mut config.rust_dist_src, t.src_tarball);
1145 set(&mut config.missing_tools, t.missing_tools);
1148 config.initial_rustfmt = config.initial_rustfmt.or_else({
1149 let build = config.build;
1150 let initial_rustc = &config.initial_rustc;
1153 // Cargo does not provide a RUSTFMT environment variable, so we
1154 // synthesize it manually.
1155 let rustfmt = initial_rustc.with_file_name(exe("rustfmt", build));
1157 if rustfmt.exists() { Some(rustfmt) } else { None }
1161 // Now that we've reached the end of our configuration, infer the
1162 // default values for all options that we haven't otherwise stored yet.
1164 config.llvm_skip_rebuild = llvm_skip_rebuild.unwrap_or(false);
1165 config.llvm_assertions = llvm_assertions.unwrap_or(false);
1166 config.llvm_tests = llvm_tests.unwrap_or(false);
1167 config.llvm_plugins = llvm_plugins.unwrap_or(false);
1168 config.rust_optimize = optimize.unwrap_or(true);
1170 let default = debug == Some(true);
1171 config.rust_debug_assertions = debug_assertions.unwrap_or(default);
1172 config.rust_debug_assertions_std =
1173 debug_assertions_std.unwrap_or(config.rust_debug_assertions);
1174 config.rust_overflow_checks = overflow_checks.unwrap_or(default);
1175 config.rust_overflow_checks_std =
1176 overflow_checks_std.unwrap_or(config.rust_overflow_checks);
1178 config.rust_debug_logging = debug_logging.unwrap_or(config.rust_debug_assertions);
1180 let with_defaults = |debuginfo_level_specific: Option<u32>| {
1181 debuginfo_level_specific.or(debuginfo_level).unwrap_or(if debug == Some(true) {
1187 config.rust_debuginfo_level_rustc = with_defaults(debuginfo_level_rustc);
1188 config.rust_debuginfo_level_std = with_defaults(debuginfo_level_std);
1189 config.rust_debuginfo_level_tools = with_defaults(debuginfo_level_tools);
1190 config.rust_debuginfo_level_tests = debuginfo_level_tests.unwrap_or(0);
1192 let default = config.channel == "dev";
1193 config.ignore_git = ignore_git.unwrap_or(default);
1195 let download_rustc = config.download_rustc;
1196 // See https://github.com/rust-lang/compiler-team/issues/326
1197 config.stage = match config.cmd {
1198 Subcommand::Check { .. } => flags.stage.or(build.check_stage).unwrap_or(0),
1199 // `download-rustc` only has a speed-up for stage2 builds. Default to stage2 unless explicitly overridden.
1200 Subcommand::Doc { .. } => {
1201 flags.stage.or(build.doc_stage).unwrap_or(if download_rustc { 2 } else { 0 })
1203 Subcommand::Build { .. } => {
1204 flags.stage.or(build.build_stage).unwrap_or(if download_rustc { 2 } else { 1 })
1206 Subcommand::Test { .. } => {
1207 flags.stage.or(build.test_stage).unwrap_or(if download_rustc { 2 } else { 1 })
1209 Subcommand::Bench { .. } => flags.stage.or(build.bench_stage).unwrap_or(2),
1210 Subcommand::Dist { .. } => flags.stage.or(build.dist_stage).unwrap_or(2),
1211 Subcommand::Install { .. } => flags.stage.or(build.install_stage).unwrap_or(2),
1212 // These are all bootstrap tools, which don't depend on the compiler.
1213 // The stage we pass shouldn't matter, but use 0 just in case.
1214 Subcommand::Clean { .. }
1215 | Subcommand::Clippy { .. }
1216 | Subcommand::Fix { .. }
1217 | Subcommand::Run { .. }
1218 | Subcommand::Setup { .. }
1219 | Subcommand::Format { .. } => flags.stage.unwrap_or(0),
1222 // CI should always run stage 2 builds, unless it specifically states otherwise
1224 if flags.stage.is_none() && crate::CiEnv::current() != crate::CiEnv::None {
1226 Subcommand::Test { .. }
1227 | Subcommand::Doc { .. }
1228 | Subcommand::Build { .. }
1229 | Subcommand::Bench { .. }
1230 | Subcommand::Dist { .. }
1231 | Subcommand::Install { .. } => {
1234 "x.py should be run with `--stage 2` on CI, but was run with `--stage {}`",
1238 Subcommand::Clean { .. }
1239 | Subcommand::Check { .. }
1240 | Subcommand::Clippy { .. }
1241 | Subcommand::Fix { .. }
1242 | Subcommand::Run { .. }
1243 | Subcommand::Setup { .. }
1244 | Subcommand::Format { .. } => {}
1251 /// Try to find the relative path of `bindir`, otherwise return it in full.
1252 pub fn bindir_relative(&self) -> &Path {
1253 let bindir = &self.bindir;
1254 if bindir.is_absolute() {
1255 // Try to make it relative to the prefix.
1256 if let Some(prefix) = &self.prefix {
1257 if let Ok(stripped) = bindir.strip_prefix(prefix) {
1265 /// Try to find the relative path of `libdir`.
1266 pub fn libdir_relative(&self) -> Option<&Path> {
1267 let libdir = self.libdir.as_ref()?;
1268 if libdir.is_relative() {
1271 // Try to make it relative to the prefix.
1272 libdir.strip_prefix(self.prefix.as_ref()?).ok()
1276 /// The absolute path to the downloaded LLVM artifacts.
1277 pub(crate) fn ci_llvm_root(&self) -> PathBuf {
1278 assert!(self.llvm_from_ci);
1279 self.out.join(&*self.build.triple).join("ci-llvm")
1282 /// Determine whether llvm should be linked dynamically.
1284 /// If `false`, llvm should be linked statically.
1285 /// This is computed on demand since LLVM might have to first be downloaded from CI.
1286 pub(crate) fn llvm_link_shared(builder: &Builder<'_>) -> bool {
1287 let mut opt = builder.config.llvm_link_shared.get();
1288 if opt.is_none() && builder.config.dry_run {
1289 // just assume static for now - dynamic linking isn't supported on all platforms
1293 let llvm_link_shared = *opt.get_or_insert_with(|| {
1294 if builder.config.llvm_from_ci {
1295 crate::native::maybe_download_ci_llvm(builder);
1296 let ci_llvm = builder.config.ci_llvm_root();
1298 std::fs::read_to_string(ci_llvm.join("link-type.txt")),
1299 format!("CI llvm missing: {}", ci_llvm.display())
1301 link_type == "dynamic"
1303 // unclear how thought-through this default is, but it maintains compatibility with
1304 // previous behavior
1308 builder.config.llvm_link_shared.set(opt);
1312 pub fn verbose(&self) -> bool {
1316 pub fn sanitizers_enabled(&self, target: TargetSelection) -> bool {
1317 self.target_config.get(&target).map(|t| t.sanitizers).flatten().unwrap_or(self.sanitizers)
1320 pub fn any_sanitizers_enabled(&self) -> bool {
1321 self.target_config.values().any(|t| t.sanitizers == Some(true)) || self.sanitizers
1324 pub fn profiler_enabled(&self, target: TargetSelection) -> bool {
1325 self.target_config.get(&target).map(|t| t.profiler).flatten().unwrap_or(self.profiler)
1328 pub fn any_profiler_enabled(&self) -> bool {
1329 self.target_config.values().any(|t| t.profiler == Some(true)) || self.profiler
1332 pub fn llvm_enabled(&self) -> bool {
1333 self.rust_codegen_backends.contains(&INTERNER.intern_str("llvm"))
1336 pub fn llvm_libunwind(&self, target: TargetSelection) -> LlvmLibunwind {
1339 .and_then(|t| t.llvm_libunwind)
1340 .or(self.llvm_libunwind_default)
1341 .unwrap_or(LlvmLibunwind::No)
1344 pub fn submodules(&self, rust_info: &GitInfo) -> bool {
1345 self.submodules.unwrap_or(rust_info.is_git())
1349 fn set<T>(field: &mut T, val: Option<T>) {
1350 if let Some(v) = val {
1355 fn threads_from_config(v: u32) -> u32 {
1357 0 => std::thread::available_parallelism().map_or(1, std::num::NonZeroUsize::get) as u32,