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::flags::Flags;
17 pub use crate::flags::Subcommand;
21 use serde::Deserialize;
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`.
46 pub changelog_seen: Option<usize>,
47 pub ccache: Option<String>,
48 /// Call Build::ninja() instead of this.
49 pub ninja_in_file: bool,
52 pub fast_submodules: bool,
53 pub compiler_docs: bool,
55 pub locked_deps: bool,
57 pub target_config: HashMap<TargetSelection, Target>,
58 pub full_bootstrap: bool,
60 pub tools: Option<HashSet<String>>,
64 pub exclude: Vec<PathBuf>,
65 pub include_default_paths: bool,
66 pub rustc_error_format: Option<String>,
67 pub json_output: bool,
68 pub test_compare_mode: bool,
69 pub llvm_libunwind: Option<LlvmLibunwind>,
71 pub on_fail: Option<String>,
73 pub keep_stage: Vec<u32>,
74 pub keep_stage_std: Vec<u32>,
76 // defaults to `config.toml`
78 pub jobs: Option<u32>,
80 pub incremental: bool,
83 pub deny_warnings: bool,
84 pub backtrace_on_ice: bool,
86 // llvm codegen options
87 pub llvm_skip_rebuild: bool,
88 pub llvm_assertions: bool,
89 pub llvm_optimize: bool,
90 pub llvm_thin_lto: bool,
91 pub llvm_release_debuginfo: bool,
92 pub llvm_version_check: bool,
93 pub llvm_static_stdcpp: bool,
94 pub llvm_link_shared: bool,
95 pub llvm_clang_cl: Option<String>,
96 pub llvm_targets: Option<String>,
97 pub llvm_experimental_targets: Option<String>,
98 pub llvm_link_jobs: Option<u32>,
99 pub llvm_version_suffix: Option<String>,
100 pub llvm_use_linker: Option<String>,
101 pub llvm_allow_old_toolchain: Option<bool>,
102 pub llvm_from_ci: bool,
105 pub lld_enabled: bool,
106 pub llvm_tools_enabled: bool,
108 pub llvm_cflags: Option<String>,
109 pub llvm_cxxflags: Option<String>,
110 pub llvm_ldflags: Option<String>,
111 pub llvm_use_libcxx: bool,
113 // rust codegen options
114 pub rust_optimize: bool,
115 pub rust_codegen_units: Option<u32>,
116 pub rust_codegen_units_std: Option<u32>,
117 pub rust_debug_assertions: bool,
118 pub rust_debug_assertions_std: bool,
119 pub rust_debug_logging: bool,
120 pub rust_debuginfo_level_rustc: u32,
121 pub rust_debuginfo_level_std: u32,
122 pub rust_debuginfo_level_tools: u32,
123 pub rust_debuginfo_level_tests: u32,
124 pub rust_rpath: bool,
125 pub rustc_parallel: bool,
126 pub rustc_default_linker: Option<String>,
127 pub rust_optimize_tests: bool,
128 pub rust_dist_src: bool,
129 pub rust_codegen_backends: Vec<Interned<String>>,
130 pub rust_verify_llvm_ir: bool,
131 pub rust_thin_lto_import_instr_limit: Option<u32>,
132 pub rust_remap_debuginfo: bool,
133 pub rust_new_symbol_mangling: bool,
135 pub build: TargetSelection,
136 pub hosts: Vec<TargetSelection>,
137 pub targets: Vec<TargetSelection>,
138 pub local_rebuild: bool,
140 pub control_flow_guard: bool,
143 pub dist_sign_folder: Option<PathBuf>,
144 pub dist_upload_addr: Option<String>,
145 pub dist_gpg_password_file: Option<PathBuf>,
148 pub backtrace: bool, // support for RUST_BACKTRACE
151 pub low_priority: bool,
153 pub verbose_tests: bool,
154 pub save_toolstates: Option<PathBuf>,
155 pub print_step_timings: bool,
156 pub missing_tools: bool,
158 // Fallback musl-root for all targets
159 pub musl_root: Option<PathBuf>,
160 pub prefix: Option<PathBuf>,
161 pub sysconfdir: Option<PathBuf>,
162 pub datadir: Option<PathBuf>,
163 pub docdir: Option<PathBuf>,
165 pub libdir: Option<PathBuf>,
166 pub mandir: Option<PathBuf>,
167 pub codegen_tests: bool,
168 pub nodejs: Option<PathBuf>,
169 pub gdb: Option<PathBuf>,
170 pub python: Option<PathBuf>,
171 pub cargo_native_static: bool,
172 pub configure_args: Vec<String>,
174 // These are either the stage0 downloaded binaries or the locally installed ones.
175 pub initial_cargo: PathBuf,
176 pub initial_rustc: PathBuf,
177 pub initial_rustfmt: Option<PathBuf>,
181 #[derive(Debug, Clone, Copy, PartialEq)]
182 pub enum LlvmLibunwind {
188 impl Default for LlvmLibunwind {
189 fn default() -> Self {
194 impl FromStr for LlvmLibunwind {
197 fn from_str(value: &str) -> Result<Self, Self::Err> {
199 "no" => Ok(Self::No),
200 "in-tree" => Ok(Self::InTree),
201 "system" => Ok(Self::System),
202 invalid => Err(format!("Invalid value '{}' for rust.llvm-libunwind config.", invalid)),
207 #[derive(Debug, Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
208 pub struct TargetSelection {
209 pub triple: Interned<String>,
210 file: Option<Interned<String>>,
213 impl TargetSelection {
214 pub fn from_user(selection: &str) -> Self {
215 let path = Path::new(selection);
217 let (triple, file) = if path.exists() {
220 .expect("Target specification file has no file stem")
222 .expect("Target specification file stem is not UTF-8");
224 (triple, Some(selection))
229 let triple = INTERNER.intern_str(triple);
230 let file = file.map(|f| INTERNER.intern_str(f));
232 Self { triple, file }
235 pub fn rustc_target_arg(&self) -> &str {
236 self.file.as_ref().unwrap_or(&self.triple)
239 pub fn contains(&self, needle: &str) -> bool {
240 self.triple.contains(needle)
243 pub fn starts_with(&self, needle: &str) -> bool {
244 self.triple.starts_with(needle)
247 pub fn ends_with(&self, needle: &str) -> bool {
248 self.triple.ends_with(needle)
252 impl fmt::Display for TargetSelection {
253 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
254 write!(f, "{}", self.triple)?;
255 if let Some(file) = self.file {
256 write!(f, "({})", file)?;
262 impl PartialEq<&str> for TargetSelection {
263 fn eq(&self, other: &&str) -> bool {
264 self.triple == *other
268 /// Per-target configuration stored in the global configuration structure.
271 /// Some(path to llvm-config) if using an external LLVM.
272 pub llvm_config: Option<PathBuf>,
273 /// Some(path to FileCheck) if one was specified.
274 pub llvm_filecheck: Option<PathBuf>,
275 pub cc: Option<PathBuf>,
276 pub cxx: Option<PathBuf>,
277 pub ar: Option<PathBuf>,
278 pub ranlib: Option<PathBuf>,
279 pub linker: Option<PathBuf>,
280 pub ndk: Option<PathBuf>,
281 pub crt_static: Option<bool>,
282 pub musl_root: Option<PathBuf>,
283 pub musl_libdir: Option<PathBuf>,
284 pub wasi_root: Option<PathBuf>,
285 pub qemu_rootfs: Option<PathBuf>,
290 pub fn from_triple(triple: &str) -> Self {
291 let mut target: Self = Default::default();
292 if triple.contains("-none") || triple.contains("nvptx") {
293 target.no_std = true;
298 /// Structure of the `config.toml` file that configuration is read from.
300 /// This structure uses `Decodable` to automatically decode a TOML configuration
301 /// file into this format, and then this is traversed and written into the above
302 /// `Config` structure.
303 #[derive(Deserialize, Default)]
304 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
306 changelog_seen: Option<usize>,
307 build: Option<Build>,
308 install: Option<Install>,
311 target: Option<HashMap<String, TomlTarget>>,
313 profile: Option<String>,
316 impl Merge for TomlConfig {
319 TomlConfig { build, install, llvm, rust, dist, target, profile: _, changelog_seen: _ }: Self,
321 fn do_merge<T: Merge>(x: &mut Option<T>, y: Option<T>) {
322 if let Some(new) = y {
323 if let Some(original) = x {
330 do_merge(&mut self.build, build);
331 do_merge(&mut self.install, install);
332 do_merge(&mut self.llvm, llvm);
333 do_merge(&mut self.rust, rust);
334 do_merge(&mut self.dist, dist);
335 assert!(target.is_none(), "merging target-specific config is not currently supported");
339 /// TOML representation of various global build decisions.
340 #[derive(Deserialize, Default, Clone, Merge)]
341 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
343 build: Option<String>,
344 host: Option<Vec<String>>,
345 target: Option<Vec<String>>,
346 // This is ignored, the rust code always gets the build directory from the `BUILD_DIR` env variable
347 build_dir: Option<String>,
348 cargo: Option<String>,
349 rustc: Option<String>,
350 rustfmt: Option<PathBuf>,
352 compiler_docs: Option<bool>,
353 submodules: Option<bool>,
354 fast_submodules: Option<bool>,
356 nodejs: Option<String>,
357 python: Option<String>,
358 locked_deps: Option<bool>,
359 vendor: Option<bool>,
360 full_bootstrap: Option<bool>,
361 extended: Option<bool>,
362 tools: Option<HashSet<String>>,
363 verbose: Option<usize>,
364 sanitizers: Option<bool>,
365 profiler: Option<bool>,
366 cargo_native_static: Option<bool>,
367 low_priority: Option<bool>,
368 configure_args: Option<Vec<String>>,
369 local_rebuild: Option<bool>,
370 print_step_timings: Option<bool>,
371 doc_stage: Option<u32>,
372 build_stage: Option<u32>,
373 test_stage: Option<u32>,
374 install_stage: Option<u32>,
375 dist_stage: Option<u32>,
376 bench_stage: Option<u32>,
379 /// TOML representation of various global install decisions.
380 #[derive(Deserialize, Default, Clone, Merge)]
381 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
383 prefix: Option<String>,
384 sysconfdir: Option<String>,
385 docdir: Option<String>,
386 bindir: Option<String>,
387 libdir: Option<String>,
388 mandir: Option<String>,
389 datadir: Option<String>,
391 // standard paths, currently unused
392 infodir: Option<String>,
393 localstatedir: Option<String>,
396 /// TOML representation of how the LLVM build is configured.
397 #[derive(Deserialize, Default, Merge)]
398 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
400 skip_rebuild: Option<bool>,
401 optimize: Option<bool>,
402 thin_lto: Option<bool>,
403 release_debuginfo: Option<bool>,
404 assertions: Option<bool>,
405 ccache: Option<StringOrBool>,
406 version_check: Option<bool>,
407 static_libstdcpp: Option<bool>,
409 targets: Option<String>,
410 experimental_targets: Option<String>,
411 link_jobs: Option<u32>,
412 link_shared: Option<bool>,
413 version_suffix: Option<String>,
414 clang_cl: Option<String>,
415 cflags: Option<String>,
416 cxxflags: Option<String>,
417 ldflags: Option<String>,
418 use_libcxx: Option<bool>,
419 use_linker: Option<String>,
420 allow_old_toolchain: Option<bool>,
421 download_ci_llvm: Option<StringOrBool>,
424 #[derive(Deserialize, Default, Clone, Merge)]
425 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
427 sign_folder: Option<String>,
428 gpg_password_file: Option<String>,
429 upload_addr: Option<String>,
430 src_tarball: Option<bool>,
431 missing_tools: Option<bool>,
434 #[derive(Deserialize)]
441 impl Default for StringOrBool {
442 fn default() -> StringOrBool {
443 StringOrBool::Bool(false)
447 /// TOML representation of how the Rust build is configured.
448 #[derive(Deserialize, Default, Merge)]
449 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
451 optimize: Option<bool>,
453 codegen_units: Option<u32>,
454 codegen_units_std: Option<u32>,
455 debug_assertions: Option<bool>,
456 debug_assertions_std: Option<bool>,
457 debug_logging: Option<bool>,
458 debuginfo_level: Option<u32>,
459 debuginfo_level_rustc: Option<u32>,
460 debuginfo_level_std: Option<u32>,
461 debuginfo_level_tools: Option<u32>,
462 debuginfo_level_tests: Option<u32>,
463 backtrace: Option<bool>,
464 incremental: Option<bool>,
465 parallel_compiler: Option<bool>,
466 default_linker: Option<String>,
467 channel: Option<String>,
468 musl_root: Option<String>,
470 verbose_tests: Option<bool>,
471 optimize_tests: Option<bool>,
472 codegen_tests: Option<bool>,
473 ignore_git: Option<bool>,
474 dist_src: Option<bool>,
475 save_toolstates: Option<String>,
476 codegen_backends: Option<Vec<String>>,
478 use_lld: Option<bool>,
479 llvm_tools: Option<bool>,
480 deny_warnings: Option<bool>,
481 backtrace_on_ice: Option<bool>,
482 verify_llvm_ir: Option<bool>,
483 thin_lto_import_instr_limit: Option<u32>,
484 remap_debuginfo: Option<bool>,
485 jemalloc: Option<bool>,
486 test_compare_mode: Option<bool>,
487 llvm_libunwind: Option<String>,
488 control_flow_guard: Option<bool>,
489 new_symbol_mangling: Option<bool>,
492 /// TOML representation of how each build target is configured.
493 #[derive(Deserialize, Default, Merge)]
494 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
499 ranlib: Option<String>,
500 linker: Option<String>,
501 llvm_config: Option<String>,
502 llvm_filecheck: Option<String>,
503 android_ndk: Option<String>,
504 crt_static: Option<bool>,
505 musl_root: Option<String>,
506 musl_libdir: Option<String>,
507 wasi_root: Option<String>,
508 qemu_rootfs: Option<String>,
509 no_std: Option<bool>,
513 fn path_from_python(var_key: &str) -> PathBuf {
514 match env::var_os(var_key) {
515 Some(var_val) => Self::normalize_python_path(var_val),
516 _ => panic!("expected '{}' to be set", var_key),
520 /// Normalizes paths from Python slightly. We don't trust paths from Python (#49785).
521 fn normalize_python_path(path: OsString) -> PathBuf {
522 Path::new(&path).components().collect()
525 pub fn default_opts() -> Config {
526 let mut config = Config::default();
527 config.llvm_optimize = true;
528 config.ninja_in_file = true;
529 config.llvm_version_check = true;
530 config.backtrace = true;
531 config.rust_optimize = true;
532 config.rust_optimize_tests = true;
533 config.submodules = true;
534 config.fast_submodules = true;
536 config.rust_rpath = true;
537 config.channel = "dev".to_string();
538 config.codegen_tests = true;
539 config.ignore_git = false;
540 config.rust_dist_src = true;
541 config.rust_codegen_backends = vec![INTERNER.intern_str("llvm")];
542 config.deny_warnings = true;
543 config.missing_tools = false;
545 // set by bootstrap.py
546 config.build = TargetSelection::from_user(&env!("BUILD_TRIPLE"));
547 let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
548 // Undo `src/bootstrap`
549 config.src = manifest_dir.parent().unwrap().parent().unwrap().to_owned();
550 config.out = Config::path_from_python("BUILD_DIR");
552 config.initial_cargo = PathBuf::from(env!("CARGO"));
553 config.initial_rustc = PathBuf::from(env!("RUSTC"));
558 pub fn parse(args: &[String]) -> Config {
559 let flags = Flags::parse(&args);
561 let mut config = Config::default_opts();
562 config.exclude = flags.exclude;
563 config.include_default_paths = flags.include_default_paths;
564 config.rustc_error_format = flags.rustc_error_format;
565 config.json_output = flags.json_output;
566 config.on_fail = flags.on_fail;
567 config.jobs = flags.jobs.map(threads_from_config);
568 config.cmd = flags.cmd;
569 config.incremental = flags.incremental;
570 config.dry_run = flags.dry_run;
571 config.keep_stage = flags.keep_stage;
572 config.keep_stage_std = flags.keep_stage_std;
573 config.bindir = "bin".into(); // default
574 if let Some(value) = flags.deny_warnings {
575 config.deny_warnings = value;
579 let dir = config.out.join("tmp-dry-run");
580 t!(fs::create_dir_all(&dir));
585 let get_toml = |_| TomlConfig::default();
587 let get_toml = |file: &Path| {
590 let contents = t!(fs::read_to_string(file), "`include` config not found");
591 match toml::from_str(&contents) {
594 println!("failed to parse TOML configuration '{}': {}", file.display(), err);
600 let mut toml = flags.config.as_deref().map(get_toml).unwrap_or_else(TomlConfig::default);
601 if let Some(include) = &toml.profile {
602 let mut include_path = config.src.clone();
603 include_path.push("src");
604 include_path.push("bootstrap");
605 include_path.push("defaults");
606 include_path.push(format!("config.{}.toml", include));
607 let included_toml = get_toml(&include_path);
608 toml.merge(included_toml);
611 config.changelog_seen = toml.changelog_seen;
612 if let Some(cfg) = flags.config {
616 let build = toml.build.unwrap_or_default();
618 config.hosts = if let Some(arg_host) = flags.host {
620 } else if let Some(file_host) = build.host {
621 file_host.iter().map(|h| TargetSelection::from_user(h)).collect()
625 config.targets = if let Some(arg_target) = flags.target {
627 } else if let Some(file_target) = build.target {
628 file_target.iter().map(|h| TargetSelection::from_user(h)).collect()
630 // If target is *not* configured, then default to the host
635 config.nodejs = build.nodejs.map(PathBuf::from);
636 config.gdb = build.gdb.map(PathBuf::from);
637 config.python = build.python.map(PathBuf::from);
638 set(&mut config.low_priority, build.low_priority);
639 set(&mut config.compiler_docs, build.compiler_docs);
640 set(&mut config.docs, build.docs);
641 set(&mut config.submodules, build.submodules);
642 set(&mut config.fast_submodules, build.fast_submodules);
643 set(&mut config.locked_deps, build.locked_deps);
644 set(&mut config.vendor, build.vendor);
645 set(&mut config.full_bootstrap, build.full_bootstrap);
646 set(&mut config.extended, build.extended);
647 config.tools = build.tools;
648 if build.rustfmt.is_some() {
649 config.initial_rustfmt = build.rustfmt;
651 set(&mut config.verbose, build.verbose);
652 set(&mut config.sanitizers, build.sanitizers);
653 set(&mut config.profiler, build.profiler);
654 set(&mut config.cargo_native_static, build.cargo_native_static);
655 set(&mut config.configure_args, build.configure_args);
656 set(&mut config.local_rebuild, build.local_rebuild);
657 set(&mut config.print_step_timings, build.print_step_timings);
659 // See https://github.com/rust-lang/compiler-team/issues/326
660 config.stage = match config.cmd {
661 Subcommand::Doc { .. } => flags.stage.or(build.doc_stage).unwrap_or(0),
662 Subcommand::Build { .. } => flags.stage.or(build.build_stage).unwrap_or(1),
663 Subcommand::Test { .. } => flags.stage.or(build.test_stage).unwrap_or(1),
664 Subcommand::Bench { .. } => flags.stage.or(build.bench_stage).unwrap_or(2),
665 Subcommand::Dist { .. } => flags.stage.or(build.dist_stage).unwrap_or(2),
666 Subcommand::Install { .. } => flags.stage.or(build.install_stage).unwrap_or(2),
667 // These are all bootstrap tools, which don't depend on the compiler.
668 // The stage we pass shouldn't matter, but use 0 just in case.
669 Subcommand::Clean { .. }
670 | Subcommand::Check { .. }
671 | Subcommand::Clippy { .. }
672 | Subcommand::Fix { .. }
673 | Subcommand::Run { .. }
674 | Subcommand::Setup { .. }
675 | Subcommand::Format { .. } => flags.stage.unwrap_or(0),
678 // CI should always run stage 2 builds, unless it specifically states otherwise
680 if flags.stage.is_none() && crate::CiEnv::current() != crate::CiEnv::None {
682 Subcommand::Test { .. }
683 | Subcommand::Doc { .. }
684 | Subcommand::Build { .. }
685 | Subcommand::Bench { .. }
686 | Subcommand::Dist { .. }
687 | Subcommand::Install { .. } => {
690 "x.py should be run with `--stage 2` on CI, but was run with `--stage {}`",
694 Subcommand::Clean { .. }
695 | Subcommand::Check { .. }
696 | Subcommand::Clippy { .. }
697 | Subcommand::Fix { .. }
698 | Subcommand::Run { .. }
699 | Subcommand::Setup { .. }
700 | Subcommand::Format { .. } => {}
704 config.verbose = cmp::max(config.verbose, flags.verbose);
706 if let Some(install) = toml.install {
707 config.prefix = install.prefix.map(PathBuf::from);
708 config.sysconfdir = install.sysconfdir.map(PathBuf::from);
709 config.datadir = install.datadir.map(PathBuf::from);
710 config.docdir = install.docdir.map(PathBuf::from);
711 set(&mut config.bindir, install.bindir.map(PathBuf::from));
712 config.libdir = install.libdir.map(PathBuf::from);
713 config.mandir = install.mandir.map(PathBuf::from);
716 // We want the llvm-skip-rebuild flag to take precedence over the
717 // skip-rebuild config.toml option so we store it separately
718 // so that we can infer the right value
719 let mut llvm_skip_rebuild = flags.llvm_skip_rebuild;
721 // Store off these values as options because if they're not provided
722 // we'll infer default values for them later
723 let mut llvm_assertions = None;
724 let mut debug = None;
725 let mut debug_assertions = None;
726 let mut debug_assertions_std = None;
727 let mut debug_logging = None;
728 let mut debuginfo_level = None;
729 let mut debuginfo_level_rustc = None;
730 let mut debuginfo_level_std = None;
731 let mut debuginfo_level_tools = None;
732 let mut debuginfo_level_tests = None;
733 let mut optimize = None;
734 let mut ignore_git = None;
736 if let Some(llvm) = toml.llvm {
738 Some(StringOrBool::String(ref s)) => config.ccache = Some(s.to_string()),
739 Some(StringOrBool::Bool(true)) => {
740 config.ccache = Some("ccache".to_string());
742 Some(StringOrBool::Bool(false)) | None => {}
744 set(&mut config.ninja_in_file, llvm.ninja);
745 llvm_assertions = llvm.assertions;
746 llvm_skip_rebuild = llvm_skip_rebuild.or(llvm.skip_rebuild);
747 set(&mut config.llvm_optimize, llvm.optimize);
748 set(&mut config.llvm_thin_lto, llvm.thin_lto);
749 set(&mut config.llvm_release_debuginfo, llvm.release_debuginfo);
750 set(&mut config.llvm_version_check, llvm.version_check);
751 set(&mut config.llvm_static_stdcpp, llvm.static_libstdcpp);
752 set(&mut config.llvm_link_shared, llvm.link_shared);
753 config.llvm_targets = llvm.targets.clone();
754 config.llvm_experimental_targets = llvm.experimental_targets.clone();
755 config.llvm_link_jobs = llvm.link_jobs;
756 config.llvm_version_suffix = llvm.version_suffix.clone();
757 config.llvm_clang_cl = llvm.clang_cl.clone();
759 config.llvm_cflags = llvm.cflags.clone();
760 config.llvm_cxxflags = llvm.cxxflags.clone();
761 config.llvm_ldflags = llvm.ldflags.clone();
762 set(&mut config.llvm_use_libcxx, llvm.use_libcxx);
763 config.llvm_use_linker = llvm.use_linker.clone();
764 config.llvm_allow_old_toolchain = llvm.allow_old_toolchain;
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 config.build.triple == "x86_64-unknown-linux-gnu"
770 Some(StringOrBool::Bool(b)) => b,
774 if config.llvm_from_ci {
775 // None of the LLVM options, except assertions, are supported
776 // when using downloaded LLVM. We could just ignore these but
777 // that's potentially confusing, so force them to not be
778 // explicitly set. The defaults and CI defaults don't
779 // necessarily match but forcing people to match (somewhat
780 // arbitrary) CI configuration locally seems bad/hard.
781 check_ci_llvm!(llvm.optimize);
782 check_ci_llvm!(llvm.thin_lto);
783 check_ci_llvm!(llvm.release_debuginfo);
784 check_ci_llvm!(llvm.link_shared);
785 check_ci_llvm!(llvm.static_libstdcpp);
786 check_ci_llvm!(llvm.targets);
787 check_ci_llvm!(llvm.experimental_targets);
788 check_ci_llvm!(llvm.link_jobs);
789 check_ci_llvm!(llvm.link_shared);
790 check_ci_llvm!(llvm.clang_cl);
791 check_ci_llvm!(llvm.version_suffix);
792 check_ci_llvm!(llvm.cflags);
793 check_ci_llvm!(llvm.cxxflags);
794 check_ci_llvm!(llvm.ldflags);
795 check_ci_llvm!(llvm.use_libcxx);
796 check_ci_llvm!(llvm.use_linker);
797 check_ci_llvm!(llvm.allow_old_toolchain);
799 // CI-built LLVM is shared
800 config.llvm_link_shared = true;
803 if config.llvm_thin_lto {
804 // If we're building with ThinLTO on, we want to link to LLVM
805 // shared, to avoid re-doing ThinLTO (which happens in the link
806 // step) with each stage.
807 config.llvm_link_shared = true;
811 if let Some(rust) = toml.rust {
813 debug_assertions = rust.debug_assertions;
814 debug_assertions_std = rust.debug_assertions_std;
815 debug_logging = rust.debug_logging;
816 debuginfo_level = rust.debuginfo_level;
817 debuginfo_level_rustc = rust.debuginfo_level_rustc;
818 debuginfo_level_std = rust.debuginfo_level_std;
819 debuginfo_level_tools = rust.debuginfo_level_tools;
820 debuginfo_level_tests = rust.debuginfo_level_tests;
821 optimize = rust.optimize;
822 ignore_git = rust.ignore_git;
823 set(&mut config.rust_new_symbol_mangling, rust.new_symbol_mangling);
824 set(&mut config.rust_optimize_tests, rust.optimize_tests);
825 set(&mut config.codegen_tests, rust.codegen_tests);
826 set(&mut config.rust_rpath, rust.rpath);
827 set(&mut config.jemalloc, rust.jemalloc);
828 set(&mut config.test_compare_mode, rust.test_compare_mode);
829 config.llvm_libunwind = rust
831 .map(|v| v.parse().expect("failed to parse rust.llvm-libunwind"));
832 set(&mut config.backtrace, rust.backtrace);
833 set(&mut config.channel, rust.channel);
834 set(&mut config.rust_dist_src, rust.dist_src);
835 set(&mut config.verbose_tests, rust.verbose_tests);
836 // in the case "false" is set explicitly, do not overwrite the command line args
837 if let Some(true) = rust.incremental {
838 config.incremental = true;
840 set(&mut config.use_lld, rust.use_lld);
841 set(&mut config.lld_enabled, rust.lld);
842 set(&mut config.llvm_tools_enabled, rust.llvm_tools);
843 config.rustc_parallel = rust.parallel_compiler.unwrap_or(false);
844 config.rustc_default_linker = rust.default_linker;
845 config.musl_root = rust.musl_root.map(PathBuf::from);
846 config.save_toolstates = rust.save_toolstates.map(PathBuf::from);
847 set(&mut config.deny_warnings, flags.deny_warnings.or(rust.deny_warnings));
848 set(&mut config.backtrace_on_ice, rust.backtrace_on_ice);
849 set(&mut config.rust_verify_llvm_ir, rust.verify_llvm_ir);
850 config.rust_thin_lto_import_instr_limit = rust.thin_lto_import_instr_limit;
851 set(&mut config.rust_remap_debuginfo, rust.remap_debuginfo);
852 set(&mut config.control_flow_guard, rust.control_flow_guard);
854 if let Some(ref backends) = rust.codegen_backends {
855 config.rust_codegen_backends =
856 backends.iter().map(|s| INTERNER.intern_str(s)).collect();
859 config.rust_codegen_units = rust.codegen_units.map(threads_from_config);
860 config.rust_codegen_units_std = rust.codegen_units_std.map(threads_from_config);
863 if let Some(t) = toml.target {
864 for (triple, cfg) in t {
865 let mut target = Target::from_triple(&triple);
867 if let Some(ref s) = cfg.llvm_config {
868 target.llvm_config = Some(config.src.join(s));
870 if let Some(ref s) = cfg.llvm_filecheck {
871 target.llvm_filecheck = Some(config.src.join(s));
873 if let Some(ref s) = cfg.android_ndk {
874 target.ndk = Some(config.src.join(s));
876 if let Some(s) = cfg.no_std {
879 target.cc = cfg.cc.map(PathBuf::from);
880 target.cxx = cfg.cxx.map(PathBuf::from);
881 target.ar = cfg.ar.map(PathBuf::from);
882 target.ranlib = cfg.ranlib.map(PathBuf::from);
883 target.linker = cfg.linker.map(PathBuf::from);
884 target.crt_static = cfg.crt_static;
885 target.musl_root = cfg.musl_root.map(PathBuf::from);
886 target.musl_libdir = cfg.musl_libdir.map(PathBuf::from);
887 target.wasi_root = cfg.wasi_root.map(PathBuf::from);
888 target.qemu_rootfs = cfg.qemu_rootfs.map(PathBuf::from);
890 config.target_config.insert(TargetSelection::from_user(&triple), target);
894 if config.llvm_from_ci {
895 let triple = &config.build.triple;
896 let mut build_target = config
899 .or_insert_with(|| Target::from_triple(&triple));
901 check_ci_llvm!(build_target.llvm_config);
902 check_ci_llvm!(build_target.llvm_filecheck);
903 let ci_llvm_bin = config.out.join(&*config.build.triple).join("ci-llvm/bin");
904 build_target.llvm_config = Some(ci_llvm_bin.join(exe("llvm-config", config.build)));
905 build_target.llvm_filecheck = Some(ci_llvm_bin.join(exe("FileCheck", config.build)));
908 if let Some(t) = toml.dist {
909 config.dist_sign_folder = t.sign_folder.map(PathBuf::from);
910 config.dist_gpg_password_file = t.gpg_password_file.map(PathBuf::from);
911 config.dist_upload_addr = t.upload_addr;
912 set(&mut config.rust_dist_src, t.src_tarball);
913 set(&mut config.missing_tools, t.missing_tools);
916 // Cargo does not provide a RUSTFMT environment variable, so we
917 // synthesize it manually. Note that we also later check the config.toml
918 // and set this to that path if necessary.
919 let rustfmt = config.initial_rustc.with_file_name(exe("rustfmt", config.build));
920 config.initial_rustfmt = if rustfmt.exists() { Some(rustfmt) } else { None };
922 // Now that we've reached the end of our configuration, infer the
923 // default values for all options that we haven't otherwise stored yet.
925 config.llvm_skip_rebuild = llvm_skip_rebuild.unwrap_or(false);
928 config.llvm_assertions = llvm_assertions.unwrap_or(default);
931 config.rust_optimize = optimize.unwrap_or(default);
933 let default = debug == Some(true);
934 config.rust_debug_assertions = debug_assertions.unwrap_or(default);
935 config.rust_debug_assertions_std =
936 debug_assertions_std.unwrap_or(config.rust_debug_assertions);
938 config.rust_debug_logging = debug_logging.unwrap_or(config.rust_debug_assertions);
940 let with_defaults = |debuginfo_level_specific: Option<u32>| {
941 debuginfo_level_specific.or(debuginfo_level).unwrap_or(if debug == Some(true) {
947 config.rust_debuginfo_level_rustc = with_defaults(debuginfo_level_rustc);
948 config.rust_debuginfo_level_std = with_defaults(debuginfo_level_std);
949 config.rust_debuginfo_level_tools = with_defaults(debuginfo_level_tools);
950 config.rust_debuginfo_level_tests = debuginfo_level_tests.unwrap_or(0);
952 let default = config.channel == "dev";
953 config.ignore_git = ignore_git.unwrap_or(default);
958 /// Try to find the relative path of `bindir`, otherwise return it in full.
959 pub fn bindir_relative(&self) -> &Path {
960 let bindir = &self.bindir;
961 if bindir.is_absolute() {
962 // Try to make it relative to the prefix.
963 if let Some(prefix) = &self.prefix {
964 if let Ok(stripped) = bindir.strip_prefix(prefix) {
972 /// Try to find the relative path of `libdir`.
973 pub fn libdir_relative(&self) -> Option<&Path> {
974 let libdir = self.libdir.as_ref()?;
975 if libdir.is_relative() {
978 // Try to make it relative to the prefix.
979 libdir.strip_prefix(self.prefix.as_ref()?).ok()
983 pub fn verbose(&self) -> bool {
987 pub fn very_verbose(&self) -> bool {
991 pub fn llvm_enabled(&self) -> bool {
992 self.rust_codegen_backends.contains(&INTERNER.intern_str("llvm"))
996 fn set<T>(field: &mut T, val: Option<T>) {
997 if let Some(v) = val {
1002 fn threads_from_config(v: u32) -> u32 {
1004 0 => num_cpus::get() as u32,