1 //! Serialized configuration of a build.
3 //! This module implements parsing `config.toml` configuration files to tweak
4 //! how the build runs.
7 use std::collections::{HashMap, HashSet};
9 use std::ffi::OsString;
12 use std::path::{Path, PathBuf};
13 use std::str::FromStr;
15 use crate::cache::{Interned, INTERNER};
16 use crate::channel::GitInfo;
17 pub use crate::flags::Subcommand;
18 use crate::flags::{Color, Flags};
22 use serde::Deserialize;
24 macro_rules! check_ci_llvm {
28 "setting {} is incompatible with download-ci-llvm.",
34 /// Global configuration for the entire build and/or bootstrap.
36 /// This structure is derived from a combination of both `config.toml` and
37 /// `config.mk`. As of the time of this writing it's unlikely that `config.toml`
38 /// is used all that much, so this is primarily filled out by `config.mk` which
39 /// is generated from `./configure`.
41 /// Note that this structure is not decoded directly into, but rather it is
42 /// filled out from the decoded forms of the structs below. For documentation
43 /// each field, see the corresponding fields in
44 /// `config.toml.example`.
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 fast_submodules: bool,
54 pub compiler_docs: bool,
55 pub docs_minification: bool,
57 pub locked_deps: bool,
59 pub target_config: HashMap<TargetSelection, Target>,
60 pub full_bootstrap: bool,
62 pub tools: Option<HashSet<String>>,
66 pub exclude: Vec<PathBuf>,
67 pub include_default_paths: bool,
68 pub rustc_error_format: Option<String>,
69 pub json_output: bool,
70 pub test_compare_mode: bool,
71 pub llvm_libunwind: LlvmLibunwind,
74 pub on_fail: Option<String>,
76 pub keep_stage: Vec<u32>,
77 pub keep_stage_std: Vec<u32>,
79 // defaults to `config.toml`
81 pub jobs: Option<u32>,
83 pub incremental: bool,
85 pub download_rustc: bool,
87 pub deny_warnings: bool,
88 pub backtrace_on_ice: bool,
90 // llvm codegen options
91 pub llvm_skip_rebuild: bool,
92 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 pub llvm_link_shared: bool,
100 pub llvm_clang_cl: Option<String>,
101 pub llvm_targets: Option<String>,
102 pub llvm_experimental_targets: Option<String>,
103 pub llvm_link_jobs: Option<u32>,
104 pub llvm_version_suffix: Option<String>,
105 pub llvm_use_linker: Option<String>,
106 pub llvm_allow_old_toolchain: bool,
107 pub llvm_polly: bool,
108 pub llvm_clang: bool,
109 pub llvm_from_ci: bool,
112 pub lld_enabled: bool,
113 pub llvm_tools_enabled: bool,
115 pub llvm_cflags: Option<String>,
116 pub llvm_cxxflags: Option<String>,
117 pub llvm_ldflags: Option<String>,
118 pub llvm_use_libcxx: bool,
120 // rust codegen options
121 pub rust_optimize: bool,
122 pub rust_codegen_units: Option<u32>,
123 pub rust_codegen_units_std: Option<u32>,
124 pub rust_debug_assertions: bool,
125 pub rust_debug_assertions_std: bool,
126 pub rust_overflow_checks: bool,
127 pub rust_overflow_checks_std: bool,
128 pub rust_debug_logging: bool,
129 pub rust_debuginfo_level_rustc: u32,
130 pub rust_debuginfo_level_std: u32,
131 pub rust_debuginfo_level_tools: u32,
132 pub rust_debuginfo_level_tests: u32,
133 pub rust_run_dsymutil: bool,
134 pub rust_rpath: bool,
135 pub rustc_parallel: bool,
136 pub rustc_default_linker: Option<String>,
137 pub rust_optimize_tests: bool,
138 pub rust_dist_src: bool,
139 pub rust_codegen_backends: Vec<Interned<String>>,
140 pub rust_verify_llvm_ir: bool,
141 pub rust_thin_lto_import_instr_limit: Option<u32>,
142 pub rust_remap_debuginfo: bool,
143 pub rust_new_symbol_mangling: bool,
144 pub rust_profile_use: Option<String>,
145 pub rust_profile_generate: Option<String>,
146 pub llvm_profile_use: Option<String>,
147 pub llvm_profile_generate: bool,
149 pub build: TargetSelection,
150 pub hosts: Vec<TargetSelection>,
151 pub targets: Vec<TargetSelection>,
152 pub local_rebuild: bool,
154 pub control_flow_guard: bool,
157 pub dist_sign_folder: Option<PathBuf>,
158 pub dist_upload_addr: Option<String>,
159 pub dist_compression_formats: Option<Vec<String>>,
162 pub backtrace: bool, // support for RUST_BACKTRACE
165 pub low_priority: bool,
167 pub description: Option<String>,
168 pub verbose_tests: bool,
169 pub save_toolstates: Option<PathBuf>,
170 pub print_step_timings: bool,
171 pub print_step_rusage: bool,
172 pub missing_tools: bool,
174 // Fallback musl-root for all targets
175 pub musl_root: Option<PathBuf>,
176 pub prefix: Option<PathBuf>,
177 pub sysconfdir: Option<PathBuf>,
178 pub datadir: Option<PathBuf>,
179 pub docdir: Option<PathBuf>,
181 pub libdir: Option<PathBuf>,
182 pub mandir: Option<PathBuf>,
183 pub codegen_tests: bool,
184 pub nodejs: Option<PathBuf>,
185 pub npm: Option<PathBuf>,
186 pub gdb: Option<PathBuf>,
187 pub python: Option<PathBuf>,
188 pub cargo_native_static: bool,
189 pub configure_args: Vec<String>,
191 // These are either the stage0 downloaded binaries or the locally installed ones.
192 pub initial_cargo: PathBuf,
193 pub initial_rustc: PathBuf,
194 pub initial_rustfmt: Option<PathBuf>,
198 #[derive(Debug, Clone, Copy, PartialEq)]
199 pub enum LlvmLibunwind {
205 impl Default for LlvmLibunwind {
206 fn default() -> Self {
211 impl FromStr for LlvmLibunwind {
214 fn from_str(value: &str) -> Result<Self, Self::Err> {
216 "no" => Ok(Self::No),
217 "in-tree" => Ok(Self::InTree),
218 "system" => Ok(Self::System),
219 invalid => Err(format!("Invalid value '{}' for rust.llvm-libunwind config.", invalid)),
224 #[derive(Debug, Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
225 pub struct TargetSelection {
226 pub triple: Interned<String>,
227 file: Option<Interned<String>>,
230 impl TargetSelection {
231 pub fn from_user(selection: &str) -> Self {
232 let path = Path::new(selection);
234 let (triple, file) = if path.exists() {
237 .expect("Target specification file has no file stem")
239 .expect("Target specification file stem is not UTF-8");
241 (triple, Some(selection))
246 let triple = INTERNER.intern_str(triple);
247 let file = file.map(|f| INTERNER.intern_str(f));
249 Self { triple, file }
252 pub fn rustc_target_arg(&self) -> &str {
253 self.file.as_ref().unwrap_or(&self.triple)
256 pub fn contains(&self, needle: &str) -> bool {
257 self.triple.contains(needle)
260 pub fn starts_with(&self, needle: &str) -> bool {
261 self.triple.starts_with(needle)
264 pub fn ends_with(&self, needle: &str) -> bool {
265 self.triple.ends_with(needle)
269 impl fmt::Display for TargetSelection {
270 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
271 write!(f, "{}", self.triple)?;
272 if let Some(file) = self.file {
273 write!(f, "({})", file)?;
279 impl PartialEq<&str> for TargetSelection {
280 fn eq(&self, other: &&str) -> bool {
281 self.triple == *other
285 /// Per-target configuration stored in the global configuration structure.
288 /// Some(path to llvm-config) if using an external LLVM.
289 pub llvm_config: Option<PathBuf>,
290 /// Some(path to FileCheck) if one was specified.
291 pub llvm_filecheck: Option<PathBuf>,
292 pub cc: Option<PathBuf>,
293 pub cxx: Option<PathBuf>,
294 pub ar: Option<PathBuf>,
295 pub ranlib: Option<PathBuf>,
296 pub linker: Option<PathBuf>,
297 pub ndk: Option<PathBuf>,
298 pub sanitizers: Option<bool>,
299 pub profiler: Option<bool>,
300 pub crt_static: Option<bool>,
301 pub musl_root: Option<PathBuf>,
302 pub musl_libdir: Option<PathBuf>,
303 pub wasi_root: Option<PathBuf>,
304 pub qemu_rootfs: Option<PathBuf>,
309 pub fn from_triple(triple: &str) -> Self {
310 let mut target: Self = Default::default();
311 if triple.contains("-none") || triple.contains("nvptx") {
312 target.no_std = true;
317 /// Structure of the `config.toml` file that configuration is read from.
319 /// This structure uses `Decodable` to automatically decode a TOML configuration
320 /// file into this format, and then this is traversed and written into the above
321 /// `Config` structure.
322 #[derive(Deserialize, Default)]
323 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
325 changelog_seen: Option<usize>,
326 build: Option<Build>,
327 install: Option<Install>,
330 target: Option<HashMap<String, TomlTarget>>,
332 profile: Option<String>,
335 impl Merge for TomlConfig {
338 TomlConfig { build, install, llvm, rust, dist, target, profile: _, changelog_seen: _ }: Self,
340 fn do_merge<T: Merge>(x: &mut Option<T>, y: Option<T>) {
341 if let Some(new) = y {
342 if let Some(original) = x {
349 do_merge(&mut self.build, build);
350 do_merge(&mut self.install, install);
351 do_merge(&mut self.llvm, llvm);
352 do_merge(&mut self.rust, rust);
353 do_merge(&mut self.dist, dist);
354 assert!(target.is_none(), "merging target-specific config is not currently supported");
358 /// TOML representation of various global build decisions.
359 #[derive(Deserialize, Default, Clone, Merge)]
360 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
362 build: Option<String>,
363 host: Option<Vec<String>>,
364 target: Option<Vec<String>>,
365 // This is ignored, the rust code always gets the build directory from the `BUILD_DIR` env variable
366 build_dir: Option<String>,
367 cargo: Option<String>,
368 rustc: Option<String>,
369 rustfmt: Option<PathBuf>,
371 compiler_docs: Option<bool>,
372 docs_minification: Option<bool>,
373 submodules: Option<bool>,
374 fast_submodules: Option<bool>,
376 nodejs: Option<String>,
378 python: Option<String>,
379 locked_deps: Option<bool>,
380 vendor: Option<bool>,
381 full_bootstrap: Option<bool>,
382 extended: Option<bool>,
383 tools: Option<HashSet<String>>,
384 verbose: Option<usize>,
385 sanitizers: Option<bool>,
386 profiler: Option<bool>,
387 cargo_native_static: Option<bool>,
388 low_priority: Option<bool>,
389 configure_args: Option<Vec<String>>,
390 local_rebuild: Option<bool>,
391 print_step_timings: Option<bool>,
392 print_step_rusage: Option<bool>,
393 check_stage: Option<u32>,
394 doc_stage: Option<u32>,
395 build_stage: Option<u32>,
396 test_stage: Option<u32>,
397 install_stage: Option<u32>,
398 dist_stage: Option<u32>,
399 bench_stage: Option<u32>,
400 patch_binaries_for_nix: Option<bool>,
403 /// TOML representation of various global install decisions.
404 #[derive(Deserialize, Default, Clone, Merge)]
405 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
407 prefix: Option<String>,
408 sysconfdir: Option<String>,
409 docdir: Option<String>,
410 bindir: Option<String>,
411 libdir: Option<String>,
412 mandir: Option<String>,
413 datadir: Option<String>,
416 /// TOML representation of how the LLVM build is configured.
417 #[derive(Deserialize, Default, Merge)]
418 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
420 skip_rebuild: Option<bool>,
421 optimize: Option<bool>,
422 thin_lto: Option<bool>,
423 release_debuginfo: Option<bool>,
424 assertions: Option<bool>,
425 plugins: Option<bool>,
426 ccache: Option<StringOrBool>,
427 version_check: Option<bool>,
428 static_libstdcpp: Option<bool>,
430 targets: Option<String>,
431 experimental_targets: Option<String>,
432 link_jobs: Option<u32>,
433 link_shared: Option<bool>,
434 version_suffix: Option<String>,
435 clang_cl: Option<String>,
436 cflags: Option<String>,
437 cxxflags: Option<String>,
438 ldflags: Option<String>,
439 use_libcxx: Option<bool>,
440 use_linker: Option<String>,
441 allow_old_toolchain: Option<bool>,
444 download_ci_llvm: Option<StringOrBool>,
447 #[derive(Deserialize, Default, Clone, Merge)]
448 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
450 sign_folder: Option<String>,
451 gpg_password_file: Option<String>,
452 upload_addr: Option<String>,
453 src_tarball: Option<bool>,
454 missing_tools: Option<bool>,
455 compression_formats: Option<Vec<String>>,
458 #[derive(Deserialize)]
465 impl Default for StringOrBool {
466 fn default() -> StringOrBool {
467 StringOrBool::Bool(false)
471 /// TOML representation of how the Rust build is configured.
472 #[derive(Deserialize, Default, Merge)]
473 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
475 optimize: Option<bool>,
477 codegen_units: Option<u32>,
478 codegen_units_std: Option<u32>,
479 debug_assertions: Option<bool>,
480 debug_assertions_std: Option<bool>,
481 overflow_checks: Option<bool>,
482 overflow_checks_std: Option<bool>,
483 debug_logging: Option<bool>,
484 debuginfo_level: Option<u32>,
485 debuginfo_level_rustc: Option<u32>,
486 debuginfo_level_std: Option<u32>,
487 debuginfo_level_tools: Option<u32>,
488 debuginfo_level_tests: Option<u32>,
489 run_dsymutil: Option<bool>,
490 backtrace: Option<bool>,
491 incremental: Option<bool>,
492 parallel_compiler: Option<bool>,
493 default_linker: Option<String>,
494 channel: Option<String>,
495 description: Option<String>,
496 musl_root: Option<String>,
498 verbose_tests: Option<bool>,
499 optimize_tests: Option<bool>,
500 codegen_tests: Option<bool>,
501 ignore_git: Option<bool>,
502 dist_src: Option<bool>,
503 save_toolstates: Option<String>,
504 codegen_backends: Option<Vec<String>>,
506 use_lld: Option<bool>,
507 llvm_tools: Option<bool>,
508 deny_warnings: Option<bool>,
509 backtrace_on_ice: Option<bool>,
510 verify_llvm_ir: Option<bool>,
511 thin_lto_import_instr_limit: Option<u32>,
512 remap_debuginfo: Option<bool>,
513 jemalloc: Option<bool>,
514 test_compare_mode: Option<bool>,
515 llvm_libunwind: Option<String>,
516 control_flow_guard: Option<bool>,
517 new_symbol_mangling: Option<bool>,
518 profile_generate: Option<String>,
519 profile_use: Option<String>,
520 // ignored; this is set from an env var set by bootstrap.py
521 download_rustc: Option<StringOrBool>,
524 /// TOML representation of how each build target is configured.
525 #[derive(Deserialize, Default, Merge)]
526 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
531 ranlib: Option<String>,
532 linker: Option<String>,
533 llvm_config: Option<String>,
534 llvm_filecheck: Option<String>,
535 android_ndk: Option<String>,
536 sanitizers: Option<bool>,
537 profiler: Option<bool>,
538 crt_static: Option<bool>,
539 musl_root: Option<String>,
540 musl_libdir: Option<String>,
541 wasi_root: Option<String>,
542 qemu_rootfs: Option<String>,
543 no_std: Option<bool>,
547 fn path_from_python(var_key: &str) -> PathBuf {
548 match env::var_os(var_key) {
549 Some(var_val) => Self::normalize_python_path(var_val),
550 _ => panic!("expected '{}' to be set", var_key),
554 /// Normalizes paths from Python slightly. We don't trust paths from Python (#49785).
555 fn normalize_python_path(path: OsString) -> PathBuf {
556 Path::new(&path).components().collect()
559 pub fn default_opts() -> Config {
560 let mut config = Config::default();
561 config.llvm_optimize = true;
562 config.ninja_in_file = true;
563 config.llvm_version_check = true;
564 config.backtrace = true;
565 config.rust_optimize = true;
566 config.rust_optimize_tests = true;
567 config.submodules = None;
568 config.fast_submodules = true;
570 config.docs_minification = true;
571 config.rust_rpath = true;
572 config.channel = "dev".to_string();
573 config.codegen_tests = true;
574 config.rust_dist_src = true;
575 config.rust_codegen_backends = vec![INTERNER.intern_str("llvm")];
576 config.deny_warnings = true;
577 config.bindir = "bin".into();
580 config.build = TargetSelection::from_user(&env!("BUILD_TRIPLE"));
581 let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
582 // Undo `src/bootstrap`
583 config.src = manifest_dir.parent().unwrap().parent().unwrap().to_owned();
584 config.out = Config::path_from_python("BUILD_DIR");
586 config.initial_cargo = PathBuf::from(env!("CARGO"));
587 config.initial_rustc = PathBuf::from(env!("RUSTC"));
592 pub fn parse(args: &[String]) -> Config {
593 let flags = Flags::parse(&args);
595 let mut config = Config::default_opts();
596 config.exclude = flags.exclude;
597 config.include_default_paths = flags.include_default_paths;
598 config.rustc_error_format = flags.rustc_error_format;
599 config.json_output = flags.json_output;
600 config.on_fail = flags.on_fail;
601 config.jobs = flags.jobs.map(threads_from_config);
602 config.cmd = flags.cmd;
603 config.incremental = flags.incremental;
604 config.dry_run = flags.dry_run;
605 config.keep_stage = flags.keep_stage;
606 config.keep_stage_std = flags.keep_stage_std;
607 config.color = flags.color;
608 if let Some(value) = flags.deny_warnings {
609 config.deny_warnings = value;
611 config.llvm_profile_use = flags.llvm_profile_use;
612 config.llvm_profile_generate = flags.llvm_profile_generate;
615 let dir = config.out.join("tmp-dry-run");
616 t!(fs::create_dir_all(&dir));
621 let get_toml = |_| TomlConfig::default();
623 let get_toml = |file: &Path| {
626 let contents = t!(fs::read_to_string(file), "`include` config not found");
627 match toml::from_str(&contents) {
630 println!("failed to parse TOML configuration '{}': {}", file.display(), err);
636 let mut toml = flags.config.as_deref().map(get_toml).unwrap_or_else(TomlConfig::default);
637 if let Some(include) = &toml.profile {
638 let mut include_path = config.src.clone();
639 include_path.push("src");
640 include_path.push("bootstrap");
641 include_path.push("defaults");
642 include_path.push(format!("config.{}.toml", include));
643 let included_toml = get_toml(&include_path);
644 toml.merge(included_toml);
647 config.changelog_seen = toml.changelog_seen;
648 if let Some(cfg) = flags.config {
652 let build = toml.build.unwrap_or_default();
654 config.hosts = if let Some(arg_host) = flags.host {
656 } else if let Some(file_host) = build.host {
657 file_host.iter().map(|h| TargetSelection::from_user(h)).collect()
661 config.targets = if let Some(arg_target) = flags.target {
663 } else if let Some(file_target) = build.target {
664 file_target.iter().map(|h| TargetSelection::from_user(h)).collect()
666 // If target is *not* configured, then default to the host
671 config.nodejs = build.nodejs.map(PathBuf::from);
672 config.npm = build.npm.map(PathBuf::from);
673 config.gdb = build.gdb.map(PathBuf::from);
674 config.python = build.python.map(PathBuf::from);
675 config.submodules = build.submodules;
676 set(&mut config.low_priority, build.low_priority);
677 set(&mut config.compiler_docs, build.compiler_docs);
678 set(&mut config.docs_minification, build.docs_minification);
679 set(&mut config.docs, build.docs);
680 set(&mut config.fast_submodules, build.fast_submodules);
681 set(&mut config.locked_deps, build.locked_deps);
682 set(&mut config.vendor, build.vendor);
683 set(&mut config.full_bootstrap, build.full_bootstrap);
684 set(&mut config.extended, build.extended);
685 config.tools = build.tools;
686 if build.rustfmt.is_some() {
687 config.initial_rustfmt = build.rustfmt;
689 set(&mut config.verbose, build.verbose);
690 set(&mut config.sanitizers, build.sanitizers);
691 set(&mut config.profiler, build.profiler);
692 set(&mut config.cargo_native_static, build.cargo_native_static);
693 set(&mut config.configure_args, build.configure_args);
694 set(&mut config.local_rebuild, build.local_rebuild);
695 set(&mut config.print_step_timings, build.print_step_timings);
696 set(&mut config.print_step_rusage, build.print_step_rusage);
698 config.verbose = cmp::max(config.verbose, flags.verbose);
700 if let Some(install) = toml.install {
701 config.prefix = install.prefix.map(PathBuf::from);
702 config.sysconfdir = install.sysconfdir.map(PathBuf::from);
703 config.datadir = install.datadir.map(PathBuf::from);
704 config.docdir = install.docdir.map(PathBuf::from);
705 set(&mut config.bindir, install.bindir.map(PathBuf::from));
706 config.libdir = install.libdir.map(PathBuf::from);
707 config.mandir = install.mandir.map(PathBuf::from);
710 // We want the llvm-skip-rebuild flag to take precedence over the
711 // skip-rebuild config.toml option so we store it separately
712 // so that we can infer the right value
713 let mut llvm_skip_rebuild = flags.llvm_skip_rebuild;
715 // Store off these values as options because if they're not provided
716 // we'll infer default values for them later
717 let mut llvm_assertions = None;
718 let mut llvm_plugins = None;
719 let mut debug = None;
720 let mut debug_assertions = None;
721 let mut debug_assertions_std = None;
722 let mut overflow_checks = None;
723 let mut overflow_checks_std = None;
724 let mut debug_logging = None;
725 let mut debuginfo_level = None;
726 let mut debuginfo_level_rustc = None;
727 let mut debuginfo_level_std = None;
728 let mut debuginfo_level_tools = None;
729 let mut debuginfo_level_tests = None;
730 let mut optimize = None;
731 let mut ignore_git = None;
733 if let Some(llvm) = toml.llvm {
735 Some(StringOrBool::String(ref s)) => config.ccache = Some(s.to_string()),
736 Some(StringOrBool::Bool(true)) => {
737 config.ccache = Some("ccache".to_string());
739 Some(StringOrBool::Bool(false)) | None => {}
741 set(&mut config.ninja_in_file, llvm.ninja);
742 llvm_assertions = llvm.assertions;
743 llvm_plugins = llvm.plugins;
744 llvm_skip_rebuild = llvm_skip_rebuild.or(llvm.skip_rebuild);
745 set(&mut config.llvm_optimize, llvm.optimize);
746 set(&mut config.llvm_thin_lto, llvm.thin_lto);
747 set(&mut config.llvm_release_debuginfo, llvm.release_debuginfo);
748 set(&mut config.llvm_version_check, llvm.version_check);
749 set(&mut config.llvm_static_stdcpp, llvm.static_libstdcpp);
750 set(&mut config.llvm_link_shared, llvm.link_shared);
751 config.llvm_targets = llvm.targets.clone();
752 config.llvm_experimental_targets = llvm.experimental_targets.clone();
753 config.llvm_link_jobs = llvm.link_jobs;
754 config.llvm_version_suffix = llvm.version_suffix.clone();
755 config.llvm_clang_cl = llvm.clang_cl.clone();
757 config.llvm_cflags = llvm.cflags.clone();
758 config.llvm_cxxflags = llvm.cxxflags.clone();
759 config.llvm_ldflags = llvm.ldflags.clone();
760 set(&mut config.llvm_use_libcxx, llvm.use_libcxx);
761 config.llvm_use_linker = llvm.use_linker.clone();
762 config.llvm_allow_old_toolchain = llvm.allow_old_toolchain.unwrap_or(false);
763 config.llvm_polly = llvm.polly.unwrap_or(false);
764 config.llvm_clang = llvm.clang.unwrap_or(false);
765 config.llvm_from_ci = match llvm.download_ci_llvm {
766 Some(StringOrBool::String(s)) => {
767 assert!(s == "if-available", "unknown option `{}` for download-ci-llvm", s);
768 // This is currently all tier 1 targets (since others may not have CI artifacts)
769 // https://doc.rust-lang.org/rustc/platform-support.html#tier-1
770 // FIXME: this is duplicated in bootstrap.py
771 let supported_platforms = [
772 "aarch64-unknown-linux-gnu",
773 "i686-pc-windows-gnu",
774 "i686-pc-windows-msvc",
775 "i686-unknown-linux-gnu",
776 "x86_64-unknown-linux-gnu",
777 "x86_64-apple-darwin",
778 "x86_64-pc-windows-gnu",
779 "x86_64-pc-windows-msvc",
781 supported_platforms.contains(&&*config.build.triple)
783 Some(StringOrBool::Bool(b)) => b,
787 if config.llvm_from_ci {
788 // None of the LLVM options, except assertions, are supported
789 // when using downloaded LLVM. We could just ignore these but
790 // that's potentially confusing, so force them to not be
791 // explicitly set. The defaults and CI defaults don't
792 // necessarily match but forcing people to match (somewhat
793 // arbitrary) CI configuration locally seems bad/hard.
794 check_ci_llvm!(llvm.optimize);
795 check_ci_llvm!(llvm.thin_lto);
796 check_ci_llvm!(llvm.release_debuginfo);
797 check_ci_llvm!(llvm.link_shared);
798 check_ci_llvm!(llvm.static_libstdcpp);
799 check_ci_llvm!(llvm.targets);
800 check_ci_llvm!(llvm.experimental_targets);
801 check_ci_llvm!(llvm.link_jobs);
802 check_ci_llvm!(llvm.clang_cl);
803 check_ci_llvm!(llvm.version_suffix);
804 check_ci_llvm!(llvm.cflags);
805 check_ci_llvm!(llvm.cxxflags);
806 check_ci_llvm!(llvm.ldflags);
807 check_ci_llvm!(llvm.use_libcxx);
808 check_ci_llvm!(llvm.use_linker);
809 check_ci_llvm!(llvm.allow_old_toolchain);
810 check_ci_llvm!(llvm.polly);
811 check_ci_llvm!(llvm.clang);
812 check_ci_llvm!(llvm.plugins);
814 // CI-built LLVM can be either dynamic or static.
815 let ci_llvm = config.out.join(&*config.build.triple).join("ci-llvm");
816 config.llvm_link_shared = if config.dry_run {
817 // just assume dynamic for now
821 std::fs::read_to_string(ci_llvm.join("link-type.txt")),
822 format!("CI llvm missing: {}", ci_llvm.display())
824 link_type == "dynamic"
828 if config.llvm_thin_lto {
829 // If we're building with ThinLTO on, we want to link to LLVM
830 // shared, to avoid re-doing ThinLTO (which happens in the link
831 // step) with each stage.
835 "setting link-shared=false is incompatible with thin-lto=true"
837 config.llvm_link_shared = true;
841 if let Some(rust) = toml.rust {
843 debug_assertions = rust.debug_assertions;
844 debug_assertions_std = rust.debug_assertions_std;
845 overflow_checks = rust.overflow_checks;
846 overflow_checks_std = rust.overflow_checks_std;
847 debug_logging = rust.debug_logging;
848 debuginfo_level = rust.debuginfo_level;
849 debuginfo_level_rustc = rust.debuginfo_level_rustc;
850 debuginfo_level_std = rust.debuginfo_level_std;
851 debuginfo_level_tools = rust.debuginfo_level_tools;
852 debuginfo_level_tests = rust.debuginfo_level_tests;
853 config.rust_run_dsymutil = rust.run_dsymutil.unwrap_or(false);
854 optimize = rust.optimize;
855 ignore_git = rust.ignore_git;
856 set(&mut config.rust_new_symbol_mangling, rust.new_symbol_mangling);
857 set(&mut config.rust_optimize_tests, rust.optimize_tests);
858 set(&mut config.codegen_tests, rust.codegen_tests);
859 set(&mut config.rust_rpath, rust.rpath);
860 set(&mut config.jemalloc, rust.jemalloc);
861 set(&mut config.test_compare_mode, rust.test_compare_mode);
862 config.llvm_libunwind = rust
864 .map(|v| v.parse().expect("failed to parse rust.llvm-libunwind"))
865 .unwrap_or_default();
866 set(&mut config.backtrace, rust.backtrace);
867 set(&mut config.channel, rust.channel);
868 config.description = rust.description;
869 set(&mut config.rust_dist_src, rust.dist_src);
870 set(&mut config.verbose_tests, rust.verbose_tests);
871 // in the case "false" is set explicitly, do not overwrite the command line args
872 if let Some(true) = rust.incremental {
873 config.incremental = true;
875 set(&mut config.use_lld, rust.use_lld);
876 set(&mut config.lld_enabled, rust.lld);
877 set(&mut config.llvm_tools_enabled, rust.llvm_tools);
878 config.rustc_parallel = rust.parallel_compiler.unwrap_or(false);
879 config.rustc_default_linker = rust.default_linker;
880 config.musl_root = rust.musl_root.map(PathBuf::from);
881 config.save_toolstates = rust.save_toolstates.map(PathBuf::from);
882 set(&mut config.deny_warnings, flags.deny_warnings.or(rust.deny_warnings));
883 set(&mut config.backtrace_on_ice, rust.backtrace_on_ice);
884 set(&mut config.rust_verify_llvm_ir, rust.verify_llvm_ir);
885 config.rust_thin_lto_import_instr_limit = rust.thin_lto_import_instr_limit;
886 set(&mut config.rust_remap_debuginfo, rust.remap_debuginfo);
887 set(&mut config.control_flow_guard, rust.control_flow_guard);
889 if let Some(ref backends) = rust.codegen_backends {
890 config.rust_codegen_backends =
891 backends.iter().map(|s| INTERNER.intern_str(s)).collect();
894 config.rust_codegen_units = rust.codegen_units.map(threads_from_config);
895 config.rust_codegen_units_std = rust.codegen_units_std.map(threads_from_config);
896 config.rust_profile_use = flags.rust_profile_use.or(rust.profile_use);
897 config.rust_profile_generate = flags.rust_profile_generate.or(rust.profile_generate);
898 config.download_rustc = env::var("BOOTSTRAP_DOWNLOAD_RUSTC").as_deref() == Ok("1");
900 config.rust_profile_use = flags.rust_profile_use;
901 config.rust_profile_generate = flags.rust_profile_generate;
904 if let Some(t) = toml.target {
905 for (triple, cfg) in t {
906 let mut target = Target::from_triple(&triple);
908 if let Some(ref s) = cfg.llvm_config {
909 target.llvm_config = Some(config.src.join(s));
911 if let Some(ref s) = cfg.llvm_filecheck {
912 target.llvm_filecheck = Some(config.src.join(s));
914 if let Some(ref s) = cfg.android_ndk {
915 target.ndk = Some(config.src.join(s));
917 if let Some(s) = cfg.no_std {
920 target.cc = cfg.cc.map(PathBuf::from);
921 target.cxx = cfg.cxx.map(PathBuf::from);
922 target.ar = cfg.ar.map(PathBuf::from);
923 target.ranlib = cfg.ranlib.map(PathBuf::from);
924 target.linker = cfg.linker.map(PathBuf::from);
925 target.crt_static = cfg.crt_static;
926 target.musl_root = cfg.musl_root.map(PathBuf::from);
927 target.musl_libdir = cfg.musl_libdir.map(PathBuf::from);
928 target.wasi_root = cfg.wasi_root.map(PathBuf::from);
929 target.qemu_rootfs = cfg.qemu_rootfs.map(PathBuf::from);
930 target.sanitizers = cfg.sanitizers;
931 target.profiler = cfg.profiler;
933 config.target_config.insert(TargetSelection::from_user(&triple), target);
937 if config.llvm_from_ci {
938 let triple = &config.build.triple;
939 let mut build_target = config
942 .or_insert_with(|| Target::from_triple(&triple));
944 check_ci_llvm!(build_target.llvm_config);
945 check_ci_llvm!(build_target.llvm_filecheck);
946 let ci_llvm_bin = config.out.join(&*config.build.triple).join("ci-llvm/bin");
947 build_target.llvm_config = Some(ci_llvm_bin.join(exe("llvm-config", config.build)));
948 build_target.llvm_filecheck = Some(ci_llvm_bin.join(exe("FileCheck", config.build)));
951 if let Some(t) = toml.dist {
952 config.dist_sign_folder = t.sign_folder.map(PathBuf::from);
953 config.dist_upload_addr = t.upload_addr;
954 config.dist_compression_formats = t.compression_formats;
955 set(&mut config.rust_dist_src, t.src_tarball);
956 set(&mut config.missing_tools, t.missing_tools);
959 config.initial_rustfmt = config.initial_rustfmt.or_else({
960 let build = config.build;
961 let initial_rustc = &config.initial_rustc;
964 // Cargo does not provide a RUSTFMT environment variable, so we
965 // synthesize it manually.
966 let rustfmt = initial_rustc.with_file_name(exe("rustfmt", build));
968 if rustfmt.exists() { Some(rustfmt) } else { None }
972 // Now that we've reached the end of our configuration, infer the
973 // default values for all options that we haven't otherwise stored yet.
975 config.llvm_skip_rebuild = llvm_skip_rebuild.unwrap_or(false);
976 config.llvm_assertions = llvm_assertions.unwrap_or(false);
977 config.llvm_plugins = llvm_plugins.unwrap_or(false);
978 config.rust_optimize = optimize.unwrap_or(true);
980 let default = debug == Some(true);
981 config.rust_debug_assertions = debug_assertions.unwrap_or(default);
982 config.rust_debug_assertions_std =
983 debug_assertions_std.unwrap_or(config.rust_debug_assertions);
984 config.rust_overflow_checks = overflow_checks.unwrap_or(default);
985 config.rust_overflow_checks_std =
986 overflow_checks_std.unwrap_or(config.rust_overflow_checks);
988 config.rust_debug_logging = debug_logging.unwrap_or(config.rust_debug_assertions);
990 let with_defaults = |debuginfo_level_specific: Option<u32>| {
991 debuginfo_level_specific.or(debuginfo_level).unwrap_or(if debug == Some(true) {
997 config.rust_debuginfo_level_rustc = with_defaults(debuginfo_level_rustc);
998 config.rust_debuginfo_level_std = with_defaults(debuginfo_level_std);
999 config.rust_debuginfo_level_tools = with_defaults(debuginfo_level_tools);
1000 config.rust_debuginfo_level_tests = debuginfo_level_tests.unwrap_or(0);
1002 let default = config.channel == "dev";
1003 config.ignore_git = ignore_git.unwrap_or(default);
1005 let download_rustc = config.download_rustc;
1006 // See https://github.com/rust-lang/compiler-team/issues/326
1007 config.stage = match config.cmd {
1008 Subcommand::Check { .. } => flags.stage.or(build.check_stage).unwrap_or(0),
1009 // `download-rustc` only has a speed-up for stage2 builds. Default to stage2 unless explicitly overridden.
1010 Subcommand::Doc { .. } => {
1011 flags.stage.or(build.doc_stage).unwrap_or(if download_rustc { 2 } else { 0 })
1013 Subcommand::Build { .. } => {
1014 flags.stage.or(build.build_stage).unwrap_or(if download_rustc { 2 } else { 1 })
1016 Subcommand::Test { .. } => {
1017 flags.stage.or(build.test_stage).unwrap_or(if download_rustc { 2 } else { 1 })
1019 Subcommand::Bench { .. } => flags.stage.or(build.bench_stage).unwrap_or(2),
1020 Subcommand::Dist { .. } => flags.stage.or(build.dist_stage).unwrap_or(2),
1021 Subcommand::Install { .. } => flags.stage.or(build.install_stage).unwrap_or(2),
1022 // These are all bootstrap tools, which don't depend on the compiler.
1023 // The stage we pass shouldn't matter, but use 0 just in case.
1024 Subcommand::Clean { .. }
1025 | Subcommand::Clippy { .. }
1026 | Subcommand::Fix { .. }
1027 | Subcommand::Run { .. }
1028 | Subcommand::Setup { .. }
1029 | Subcommand::Format { .. } => flags.stage.unwrap_or(0),
1032 // CI should always run stage 2 builds, unless it specifically states otherwise
1034 if flags.stage.is_none() && crate::CiEnv::current() != crate::CiEnv::None {
1036 Subcommand::Test { .. }
1037 | Subcommand::Doc { .. }
1038 | Subcommand::Build { .. }
1039 | Subcommand::Bench { .. }
1040 | Subcommand::Dist { .. }
1041 | Subcommand::Install { .. } => {
1044 "x.py should be run with `--stage 2` on CI, but was run with `--stage {}`",
1048 Subcommand::Clean { .. }
1049 | Subcommand::Check { .. }
1050 | Subcommand::Clippy { .. }
1051 | Subcommand::Fix { .. }
1052 | Subcommand::Run { .. }
1053 | Subcommand::Setup { .. }
1054 | Subcommand::Format { .. } => {}
1061 /// Try to find the relative path of `bindir`, otherwise return it in full.
1062 pub fn bindir_relative(&self) -> &Path {
1063 let bindir = &self.bindir;
1064 if bindir.is_absolute() {
1065 // Try to make it relative to the prefix.
1066 if let Some(prefix) = &self.prefix {
1067 if let Ok(stripped) = bindir.strip_prefix(prefix) {
1075 /// Try to find the relative path of `libdir`.
1076 pub fn libdir_relative(&self) -> Option<&Path> {
1077 let libdir = self.libdir.as_ref()?;
1078 if libdir.is_relative() {
1081 // Try to make it relative to the prefix.
1082 libdir.strip_prefix(self.prefix.as_ref()?).ok()
1086 pub fn verbose(&self) -> bool {
1090 pub fn very_verbose(&self) -> bool {
1094 pub fn sanitizers_enabled(&self, target: TargetSelection) -> bool {
1095 self.target_config.get(&target).map(|t| t.sanitizers).flatten().unwrap_or(self.sanitizers)
1098 pub fn any_sanitizers_enabled(&self) -> bool {
1099 self.target_config.values().any(|t| t.sanitizers == Some(true)) || self.sanitizers
1102 pub fn profiler_enabled(&self, target: TargetSelection) -> bool {
1103 self.target_config.get(&target).map(|t| t.profiler).flatten().unwrap_or(self.profiler)
1106 pub fn any_profiler_enabled(&self) -> bool {
1107 self.target_config.values().any(|t| t.profiler == Some(true)) || self.profiler
1110 pub fn llvm_enabled(&self) -> bool {
1111 self.rust_codegen_backends.contains(&INTERNER.intern_str("llvm"))
1114 pub fn submodules(&self, rust_info: &GitInfo) -> bool {
1115 self.submodules.unwrap_or(rust_info.is_git())
1119 fn set<T>(field: &mut T, val: Option<T>) {
1120 if let Some(v) = val {
1125 fn threads_from_config(v: u32) -> u32 {
1127 0 => num_cpus::get() as u32,