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};
14 use crate::cache::{Interned, INTERNER};
15 use crate::flags::Flags;
16 pub use crate::flags::Subcommand;
20 use serde::Deserialize;
22 macro_rules! check_ci_llvm {
26 "setting {} is incompatible with download-ci-llvm.",
32 /// Global configuration for the entire build and/or bootstrap.
34 /// This structure is derived from a combination of both `config.toml` and
35 /// `config.mk`. As of the time of this writing it's unlikely that `config.toml`
36 /// is used all that much, so this is primarily filled out by `config.mk` which
37 /// is generated from `./configure`.
39 /// Note that this structure is not decoded directly into, but rather it is
40 /// filled out from the decoded forms of the structs below. For documentation
41 /// each field, see the corresponding fields in
42 /// `config.toml.example`.
45 pub changelog_seen: Option<usize>,
46 pub ccache: Option<String>,
47 /// Call Build::ninja() instead of this.
48 pub ninja_in_file: bool,
51 pub fast_submodules: bool,
52 pub compiler_docs: bool,
54 pub locked_deps: bool,
56 pub target_config: HashMap<TargetSelection, Target>,
57 pub full_bootstrap: bool,
59 pub tools: Option<HashSet<String>>,
63 pub exclude: Vec<PathBuf>,
64 pub rustc_error_format: Option<String>,
65 pub json_output: bool,
66 pub test_compare_mode: bool,
67 pub llvm_libunwind: bool,
69 pub skip_only_host_steps: bool,
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, Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
182 pub struct TargetSelection {
183 pub triple: Interned<String>,
184 file: Option<Interned<String>>,
187 impl TargetSelection {
188 pub fn from_user(selection: &str) -> Self {
189 let path = Path::new(selection);
191 let (triple, file) = if path.exists() {
194 .expect("Target specification file has no file stem")
196 .expect("Target specification file stem is not UTF-8");
198 (triple, Some(selection))
203 let triple = INTERNER.intern_str(triple);
204 let file = file.map(|f| INTERNER.intern_str(f));
206 Self { triple, file }
209 pub fn rustc_target_arg(&self) -> &str {
210 self.file.as_ref().unwrap_or(&self.triple)
213 pub fn contains(&self, needle: &str) -> bool {
214 self.triple.contains(needle)
217 pub fn starts_with(&self, needle: &str) -> bool {
218 self.triple.starts_with(needle)
221 pub fn ends_with(&self, needle: &str) -> bool {
222 self.triple.ends_with(needle)
226 impl fmt::Display for TargetSelection {
227 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
228 write!(f, "{}", self.triple)?;
229 if let Some(file) = self.file {
230 write!(f, "({})", file)?;
236 impl PartialEq<&str> for TargetSelection {
237 fn eq(&self, other: &&str) -> bool {
238 self.triple == *other
242 /// Per-target configuration stored in the global configuration structure.
245 /// Some(path to llvm-config) if using an external LLVM.
246 pub llvm_config: Option<PathBuf>,
247 /// Some(path to FileCheck) if one was specified.
248 pub llvm_filecheck: Option<PathBuf>,
249 pub cc: Option<PathBuf>,
250 pub cxx: Option<PathBuf>,
251 pub ar: Option<PathBuf>,
252 pub ranlib: Option<PathBuf>,
253 pub linker: Option<PathBuf>,
254 pub ndk: Option<PathBuf>,
255 pub crt_static: Option<bool>,
256 pub musl_root: Option<PathBuf>,
257 pub musl_libdir: Option<PathBuf>,
258 pub wasi_root: Option<PathBuf>,
259 pub qemu_rootfs: Option<PathBuf>,
264 pub fn from_triple(triple: &str) -> Self {
265 let mut target: Self = Default::default();
266 if triple.contains("-none") || triple.contains("nvptx") {
267 target.no_std = true;
272 /// Structure of the `config.toml` file that configuration is read from.
274 /// This structure uses `Decodable` to automatically decode a TOML configuration
275 /// file into this format, and then this is traversed and written into the above
276 /// `Config` structure.
277 #[derive(Deserialize, Default)]
278 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
280 changelog_seen: Option<usize>,
281 build: Option<Build>,
282 install: Option<Install>,
285 target: Option<HashMap<String, TomlTarget>>,
287 profile: Option<String>,
290 impl Merge for TomlConfig {
293 TomlConfig { build, install, llvm, rust, dist, target, profile: _, changelog_seen: _ }: Self,
295 fn do_merge<T: Merge>(x: &mut Option<T>, y: Option<T>) {
296 if let Some(new) = y {
297 if let Some(original) = x {
304 do_merge(&mut self.build, build);
305 do_merge(&mut self.install, install);
306 do_merge(&mut self.llvm, llvm);
307 do_merge(&mut self.rust, rust);
308 do_merge(&mut self.dist, dist);
309 assert!(target.is_none(), "merging target-specific config is not currently supported");
313 /// TOML representation of various global build decisions.
314 #[derive(Deserialize, Default, Clone, Merge)]
315 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
317 build: Option<String>,
318 host: Option<Vec<String>>,
319 target: Option<Vec<String>>,
320 // This is ignored, the rust code always gets the build directory from the `BUILD_DIR` env variable
321 build_dir: Option<String>,
322 cargo: Option<String>,
323 rustc: Option<String>,
324 rustfmt: Option<PathBuf>,
326 compiler_docs: Option<bool>,
327 submodules: Option<bool>,
328 fast_submodules: Option<bool>,
330 nodejs: Option<String>,
331 python: Option<String>,
332 locked_deps: Option<bool>,
333 vendor: Option<bool>,
334 full_bootstrap: Option<bool>,
335 extended: Option<bool>,
336 tools: Option<HashSet<String>>,
337 verbose: Option<usize>,
338 sanitizers: Option<bool>,
339 profiler: Option<bool>,
340 cargo_native_static: Option<bool>,
341 low_priority: Option<bool>,
342 configure_args: Option<Vec<String>>,
343 local_rebuild: Option<bool>,
344 print_step_timings: Option<bool>,
345 doc_stage: Option<u32>,
346 build_stage: Option<u32>,
347 test_stage: Option<u32>,
348 install_stage: Option<u32>,
349 dist_stage: Option<u32>,
350 bench_stage: Option<u32>,
353 /// TOML representation of various global install decisions.
354 #[derive(Deserialize, Default, Clone, Merge)]
355 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
357 prefix: Option<String>,
358 sysconfdir: Option<String>,
359 docdir: Option<String>,
360 bindir: Option<String>,
361 libdir: Option<String>,
362 mandir: Option<String>,
363 datadir: Option<String>,
365 // standard paths, currently unused
366 infodir: Option<String>,
367 localstatedir: Option<String>,
370 /// TOML representation of how the LLVM build is configured.
371 #[derive(Deserialize, Default, Merge)]
372 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
374 skip_rebuild: Option<bool>,
375 optimize: Option<bool>,
376 thin_lto: Option<bool>,
377 release_debuginfo: Option<bool>,
378 assertions: Option<bool>,
379 ccache: Option<StringOrBool>,
380 version_check: Option<bool>,
381 static_libstdcpp: Option<bool>,
383 targets: Option<String>,
384 experimental_targets: Option<String>,
385 link_jobs: Option<u32>,
386 link_shared: Option<bool>,
387 version_suffix: Option<String>,
388 clang_cl: Option<String>,
389 cflags: Option<String>,
390 cxxflags: Option<String>,
391 ldflags: Option<String>,
392 use_libcxx: Option<bool>,
393 use_linker: Option<String>,
394 allow_old_toolchain: Option<bool>,
395 download_ci_llvm: Option<bool>,
398 #[derive(Deserialize, Default, Clone, Merge)]
399 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
401 sign_folder: Option<String>,
402 gpg_password_file: Option<String>,
403 upload_addr: Option<String>,
404 src_tarball: Option<bool>,
405 missing_tools: Option<bool>,
408 #[derive(Deserialize)]
415 impl Default for StringOrBool {
416 fn default() -> StringOrBool {
417 StringOrBool::Bool(false)
421 /// TOML representation of how the Rust build is configured.
422 #[derive(Deserialize, Default, Merge)]
423 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
425 optimize: Option<bool>,
427 codegen_units: Option<u32>,
428 codegen_units_std: Option<u32>,
429 debug_assertions: Option<bool>,
430 debug_assertions_std: Option<bool>,
431 debug_logging: Option<bool>,
432 debuginfo_level: Option<u32>,
433 debuginfo_level_rustc: Option<u32>,
434 debuginfo_level_std: Option<u32>,
435 debuginfo_level_tools: Option<u32>,
436 debuginfo_level_tests: Option<u32>,
437 backtrace: Option<bool>,
438 incremental: Option<bool>,
439 parallel_compiler: Option<bool>,
440 default_linker: Option<String>,
441 channel: Option<String>,
442 musl_root: Option<String>,
444 verbose_tests: Option<bool>,
445 optimize_tests: Option<bool>,
446 codegen_tests: Option<bool>,
447 ignore_git: Option<bool>,
448 dist_src: Option<bool>,
449 save_toolstates: Option<String>,
450 codegen_backends: Option<Vec<String>>,
452 use_lld: Option<bool>,
453 llvm_tools: Option<bool>,
454 deny_warnings: Option<bool>,
455 backtrace_on_ice: Option<bool>,
456 verify_llvm_ir: Option<bool>,
457 thin_lto_import_instr_limit: Option<u32>,
458 remap_debuginfo: Option<bool>,
459 jemalloc: Option<bool>,
460 test_compare_mode: Option<bool>,
461 llvm_libunwind: Option<bool>,
462 control_flow_guard: Option<bool>,
463 new_symbol_mangling: Option<bool>,
466 /// TOML representation of how each build target is configured.
467 #[derive(Deserialize, Default, Merge)]
468 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
473 ranlib: Option<String>,
474 linker: Option<String>,
475 llvm_config: Option<String>,
476 llvm_filecheck: Option<String>,
477 android_ndk: Option<String>,
478 crt_static: Option<bool>,
479 musl_root: Option<String>,
480 musl_libdir: Option<String>,
481 wasi_root: Option<String>,
482 qemu_rootfs: Option<String>,
483 no_std: Option<bool>,
487 fn path_from_python(var_key: &str) -> PathBuf {
488 match env::var_os(var_key) {
489 Some(var_val) => Self::normalize_python_path(var_val),
490 _ => panic!("expected '{}' to be set", var_key),
494 /// Normalizes paths from Python slightly. We don't trust paths from Python (#49785).
495 fn normalize_python_path(path: OsString) -> PathBuf {
496 Path::new(&path).components().collect()
499 pub fn default_opts() -> Config {
500 let mut config = Config::default();
501 config.llvm_optimize = true;
502 config.ninja_in_file = true;
503 config.llvm_version_check = true;
504 config.backtrace = true;
505 config.rust_optimize = true;
506 config.rust_optimize_tests = true;
507 config.submodules = true;
508 config.fast_submodules = true;
510 config.rust_rpath = true;
511 config.channel = "dev".to_string();
512 config.codegen_tests = true;
513 config.ignore_git = false;
514 config.rust_dist_src = true;
515 config.rust_codegen_backends = vec![INTERNER.intern_str("llvm")];
516 config.deny_warnings = true;
517 config.missing_tools = false;
518 config.config = PathBuf::from("config.toml");
520 // set by bootstrap.py
521 config.build = TargetSelection::from_user(&env!("BUILD_TRIPLE"));
522 let manifest_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
523 // Undo `src/bootstrap`
524 config.src = manifest_dir.parent().unwrap().parent().unwrap().to_owned();
525 config.out = Config::path_from_python("BUILD_DIR");
527 config.initial_cargo = PathBuf::from(env!("CARGO"));
528 config.initial_rustc = PathBuf::from(env!("RUSTC"));
533 pub fn parse(args: &[String]) -> Config {
534 let flags = Flags::parse(&args);
536 let mut config = Config::default_opts();
537 config.exclude = flags.exclude;
538 config.rustc_error_format = flags.rustc_error_format;
539 config.json_output = flags.json_output;
540 config.on_fail = flags.on_fail;
541 config.jobs = flags.jobs.map(threads_from_config);
542 config.cmd = flags.cmd;
543 config.incremental = flags.incremental;
544 config.dry_run = flags.dry_run;
545 config.keep_stage = flags.keep_stage;
546 config.keep_stage_std = flags.keep_stage_std;
547 config.bindir = "bin".into(); // default
548 if let Some(value) = flags.deny_warnings {
549 config.deny_warnings = value;
553 let dir = config.out.join("tmp-dry-run");
554 t!(fs::create_dir_all(&dir));
559 let get_toml = |_| TomlConfig::default();
561 let get_toml = |file: PathBuf| {
564 let contents = t!(fs::read_to_string(&file), "`include` config not found");
565 match toml::from_str(&contents) {
568 println!("failed to parse TOML configuration '{}': {}", file.display(), err);
574 let mut toml = flags.config.map(get_toml).unwrap_or_else(TomlConfig::default);
575 if let Some(include) = &toml.profile {
576 let mut include_path = config.src.clone();
577 include_path.push("src");
578 include_path.push("bootstrap");
579 include_path.push("defaults");
580 include_path.push(format!("config.toml.{}", include));
581 let included_toml = get_toml(include_path);
582 toml.merge(included_toml);
585 config.changelog_seen = toml.changelog_seen;
587 let build = toml.build.unwrap_or_default();
589 // If --target was specified but --host wasn't specified, don't run any host-only tests.
590 let has_hosts = build.host.is_some() || flags.host.is_some();
591 let has_targets = build.target.is_some() || flags.target.is_some();
592 config.skip_only_host_steps = !has_hosts && has_targets;
594 config.hosts = if let Some(arg_host) = flags.host {
596 } else if let Some(file_host) = build.host {
597 file_host.iter().map(|h| TargetSelection::from_user(h)).collect()
601 config.targets = if let Some(arg_target) = flags.target {
603 } else if let Some(file_target) = build.target {
604 file_target.iter().map(|h| TargetSelection::from_user(h)).collect()
606 // If target is *not* configured, then default to the host
611 config.nodejs = build.nodejs.map(PathBuf::from);
612 config.gdb = build.gdb.map(PathBuf::from);
613 config.python = build.python.map(PathBuf::from);
614 set(&mut config.low_priority, build.low_priority);
615 set(&mut config.compiler_docs, build.compiler_docs);
616 set(&mut config.docs, build.docs);
617 set(&mut config.submodules, build.submodules);
618 set(&mut config.fast_submodules, build.fast_submodules);
619 set(&mut config.locked_deps, build.locked_deps);
620 set(&mut config.vendor, build.vendor);
621 set(&mut config.full_bootstrap, build.full_bootstrap);
622 set(&mut config.extended, build.extended);
623 config.tools = build.tools;
624 if build.rustfmt.is_some() {
625 config.initial_rustfmt = build.rustfmt;
627 set(&mut config.verbose, build.verbose);
628 set(&mut config.sanitizers, build.sanitizers);
629 set(&mut config.profiler, build.profiler);
630 set(&mut config.cargo_native_static, build.cargo_native_static);
631 set(&mut config.configure_args, build.configure_args);
632 set(&mut config.local_rebuild, build.local_rebuild);
633 set(&mut config.print_step_timings, build.print_step_timings);
635 // See https://github.com/rust-lang/compiler-team/issues/326
636 config.stage = match config.cmd {
637 Subcommand::Doc { .. } => flags.stage.or(build.doc_stage).unwrap_or(0),
638 Subcommand::Build { .. } => flags.stage.or(build.build_stage).unwrap_or(1),
639 Subcommand::Test { .. } => flags.stage.or(build.test_stage).unwrap_or(1),
640 Subcommand::Bench { .. } => flags.stage.or(build.bench_stage).unwrap_or(2),
641 Subcommand::Dist { .. } => flags.stage.or(build.dist_stage).unwrap_or(2),
642 Subcommand::Install { .. } => flags.stage.or(build.install_stage).unwrap_or(2),
643 // These are all bootstrap tools, which don't depend on the compiler.
644 // The stage we pass shouldn't matter, but use 0 just in case.
645 Subcommand::Clean { .. }
646 | Subcommand::Check { .. }
647 | Subcommand::Clippy { .. }
648 | Subcommand::Fix { .. }
649 | Subcommand::Run { .. }
650 | Subcommand::Setup { .. }
651 | Subcommand::Format { .. } => flags.stage.unwrap_or(0),
654 // CI should always run stage 2 builds, unless it specifically states otherwise
656 if flags.stage.is_none() && crate::CiEnv::current() != crate::CiEnv::None {
658 Subcommand::Test { .. }
659 | Subcommand::Doc { .. }
660 | Subcommand::Build { .. }
661 | Subcommand::Bench { .. }
662 | Subcommand::Dist { .. }
663 | Subcommand::Install { .. } => {
666 "x.py should be run with `--stage 2` on CI, but was run with `--stage {}`",
670 Subcommand::Clean { .. }
671 | Subcommand::Check { .. }
672 | Subcommand::Clippy { .. }
673 | Subcommand::Fix { .. }
674 | Subcommand::Run { .. }
675 | Subcommand::Setup { .. }
676 | Subcommand::Format { .. } => {}
680 config.verbose = cmp::max(config.verbose, flags.verbose);
682 if let Some(install) = toml.install {
683 config.prefix = install.prefix.map(PathBuf::from);
684 config.sysconfdir = install.sysconfdir.map(PathBuf::from);
685 config.datadir = install.datadir.map(PathBuf::from);
686 config.docdir = install.docdir.map(PathBuf::from);
687 set(&mut config.bindir, install.bindir.map(PathBuf::from));
688 config.libdir = install.libdir.map(PathBuf::from);
689 config.mandir = install.mandir.map(PathBuf::from);
692 // We want the llvm-skip-rebuild flag to take precedence over the
693 // skip-rebuild config.toml option so we store it separately
694 // so that we can infer the right value
695 let mut llvm_skip_rebuild = flags.llvm_skip_rebuild;
697 // Store off these values as options because if they're not provided
698 // we'll infer default values for them later
699 let mut llvm_assertions = None;
700 let mut debug = None;
701 let mut debug_assertions = None;
702 let mut debug_assertions_std = None;
703 let mut debug_logging = None;
704 let mut debuginfo_level = None;
705 let mut debuginfo_level_rustc = None;
706 let mut debuginfo_level_std = None;
707 let mut debuginfo_level_tools = None;
708 let mut debuginfo_level_tests = None;
709 let mut optimize = None;
710 let mut ignore_git = None;
712 if let Some(llvm) = toml.llvm {
714 Some(StringOrBool::String(ref s)) => config.ccache = Some(s.to_string()),
715 Some(StringOrBool::Bool(true)) => {
716 config.ccache = Some("ccache".to_string());
718 Some(StringOrBool::Bool(false)) | None => {}
720 set(&mut config.ninja_in_file, llvm.ninja);
721 llvm_assertions = llvm.assertions;
722 llvm_skip_rebuild = llvm_skip_rebuild.or(llvm.skip_rebuild);
723 set(&mut config.llvm_optimize, llvm.optimize);
724 set(&mut config.llvm_thin_lto, llvm.thin_lto);
725 set(&mut config.llvm_release_debuginfo, llvm.release_debuginfo);
726 set(&mut config.llvm_version_check, llvm.version_check);
727 set(&mut config.llvm_static_stdcpp, llvm.static_libstdcpp);
728 set(&mut config.llvm_link_shared, llvm.link_shared);
729 config.llvm_targets = llvm.targets.clone();
730 config.llvm_experimental_targets = llvm.experimental_targets.clone();
731 config.llvm_link_jobs = llvm.link_jobs;
732 config.llvm_version_suffix = llvm.version_suffix.clone();
733 config.llvm_clang_cl = llvm.clang_cl.clone();
735 config.llvm_cflags = llvm.cflags.clone();
736 config.llvm_cxxflags = llvm.cxxflags.clone();
737 config.llvm_ldflags = llvm.ldflags.clone();
738 set(&mut config.llvm_use_libcxx, llvm.use_libcxx);
739 config.llvm_use_linker = llvm.use_linker.clone();
740 config.llvm_allow_old_toolchain = llvm.allow_old_toolchain;
741 config.llvm_from_ci = llvm.download_ci_llvm.unwrap_or(false);
743 if config.llvm_from_ci {
744 // None of the LLVM options, except assertions, are supported
745 // when using downloaded LLVM. We could just ignore these but
746 // that's potentially confusing, so force them to not be
747 // explicitly set. The defaults and CI defaults don't
748 // necessarily match but forcing people to match (somewhat
749 // arbitrary) CI configuration locally seems bad/hard.
750 check_ci_llvm!(llvm.optimize);
751 check_ci_llvm!(llvm.thin_lto);
752 check_ci_llvm!(llvm.release_debuginfo);
753 check_ci_llvm!(llvm.link_shared);
754 check_ci_llvm!(llvm.static_libstdcpp);
755 check_ci_llvm!(llvm.targets);
756 check_ci_llvm!(llvm.experimental_targets);
757 check_ci_llvm!(llvm.link_jobs);
758 check_ci_llvm!(llvm.link_shared);
759 check_ci_llvm!(llvm.clang_cl);
760 check_ci_llvm!(llvm.version_suffix);
761 check_ci_llvm!(llvm.cflags);
762 check_ci_llvm!(llvm.cxxflags);
763 check_ci_llvm!(llvm.ldflags);
764 check_ci_llvm!(llvm.use_libcxx);
765 check_ci_llvm!(llvm.use_linker);
766 check_ci_llvm!(llvm.allow_old_toolchain);
768 // CI-built LLVM is shared
769 config.llvm_link_shared = true;
772 if config.llvm_thin_lto {
773 // If we're building with ThinLTO on, we want to link to LLVM
774 // shared, to avoid re-doing ThinLTO (which happens in the link
775 // step) with each stage.
776 config.llvm_link_shared = true;
780 if let Some(rust) = toml.rust {
782 debug_assertions = rust.debug_assertions;
783 debug_assertions_std = rust.debug_assertions_std;
784 debug_logging = rust.debug_logging;
785 debuginfo_level = rust.debuginfo_level;
786 debuginfo_level_rustc = rust.debuginfo_level_rustc;
787 debuginfo_level_std = rust.debuginfo_level_std;
788 debuginfo_level_tools = rust.debuginfo_level_tools;
789 debuginfo_level_tests = rust.debuginfo_level_tests;
790 optimize = rust.optimize;
791 ignore_git = rust.ignore_git;
792 set(&mut config.rust_new_symbol_mangling, rust.new_symbol_mangling);
793 set(&mut config.rust_optimize_tests, rust.optimize_tests);
794 set(&mut config.codegen_tests, rust.codegen_tests);
795 set(&mut config.rust_rpath, rust.rpath);
796 set(&mut config.jemalloc, rust.jemalloc);
797 set(&mut config.test_compare_mode, rust.test_compare_mode);
798 set(&mut config.llvm_libunwind, rust.llvm_libunwind);
799 set(&mut config.backtrace, rust.backtrace);
800 set(&mut config.channel, rust.channel);
801 set(&mut config.rust_dist_src, rust.dist_src);
802 set(&mut config.verbose_tests, rust.verbose_tests);
803 // in the case "false" is set explicitly, do not overwrite the command line args
804 if let Some(true) = rust.incremental {
805 config.incremental = true;
807 set(&mut config.use_lld, rust.use_lld);
808 set(&mut config.lld_enabled, rust.lld);
809 set(&mut config.llvm_tools_enabled, rust.llvm_tools);
810 config.rustc_parallel = rust.parallel_compiler.unwrap_or(false);
811 config.rustc_default_linker = rust.default_linker;
812 config.musl_root = rust.musl_root.map(PathBuf::from);
813 config.save_toolstates = rust.save_toolstates.map(PathBuf::from);
814 set(&mut config.deny_warnings, flags.deny_warnings.or(rust.deny_warnings));
815 set(&mut config.backtrace_on_ice, rust.backtrace_on_ice);
816 set(&mut config.rust_verify_llvm_ir, rust.verify_llvm_ir);
817 config.rust_thin_lto_import_instr_limit = rust.thin_lto_import_instr_limit;
818 set(&mut config.rust_remap_debuginfo, rust.remap_debuginfo);
819 set(&mut config.control_flow_guard, rust.control_flow_guard);
821 if let Some(ref backends) = rust.codegen_backends {
822 config.rust_codegen_backends =
823 backends.iter().map(|s| INTERNER.intern_str(s)).collect();
826 config.rust_codegen_units = rust.codegen_units.map(threads_from_config);
827 config.rust_codegen_units_std = rust.codegen_units_std.map(threads_from_config);
830 if let Some(t) = toml.target {
831 for (triple, cfg) in t {
832 let mut target = Target::from_triple(&triple);
834 if let Some(ref s) = cfg.llvm_config {
835 target.llvm_config = Some(config.src.join(s));
837 if let Some(ref s) = cfg.llvm_filecheck {
838 target.llvm_filecheck = Some(config.src.join(s));
840 if let Some(ref s) = cfg.android_ndk {
841 target.ndk = Some(config.src.join(s));
843 if let Some(s) = cfg.no_std {
846 target.cc = cfg.cc.map(PathBuf::from);
847 target.cxx = cfg.cxx.map(PathBuf::from);
848 target.ar = cfg.ar.map(PathBuf::from);
849 target.ranlib = cfg.ranlib.map(PathBuf::from);
850 target.linker = cfg.linker.map(PathBuf::from);
851 target.crt_static = cfg.crt_static;
852 target.musl_root = cfg.musl_root.map(PathBuf::from);
853 target.musl_libdir = cfg.musl_libdir.map(PathBuf::from);
854 target.wasi_root = cfg.wasi_root.map(PathBuf::from);
855 target.qemu_rootfs = cfg.qemu_rootfs.map(PathBuf::from);
857 config.target_config.insert(TargetSelection::from_user(&triple), target);
861 if config.llvm_from_ci {
862 let triple = &config.build.triple;
863 let mut build_target = config
866 .or_insert_with(|| Target::from_triple(&triple));
868 check_ci_llvm!(build_target.llvm_config);
869 check_ci_llvm!(build_target.llvm_filecheck);
870 let ci_llvm_bin = config.out.join(&*config.build.triple).join("ci-llvm/bin");
871 build_target.llvm_config = Some(ci_llvm_bin.join(exe("llvm-config", config.build)));
872 build_target.llvm_filecheck = Some(ci_llvm_bin.join(exe("FileCheck", config.build)));
875 if let Some(t) = toml.dist {
876 config.dist_sign_folder = t.sign_folder.map(PathBuf::from);
877 config.dist_gpg_password_file = t.gpg_password_file.map(PathBuf::from);
878 config.dist_upload_addr = t.upload_addr;
879 set(&mut config.rust_dist_src, t.src_tarball);
880 set(&mut config.missing_tools, t.missing_tools);
883 // Cargo does not provide a RUSTFMT environment variable, so we
884 // synthesize it manually. Note that we also later check the config.toml
885 // and set this to that path if necessary.
886 let rustfmt = config.initial_rustc.with_file_name(exe("rustfmt", config.build));
887 config.initial_rustfmt = if rustfmt.exists() { Some(rustfmt) } else { None };
889 // Now that we've reached the end of our configuration, infer the
890 // default values for all options that we haven't otherwise stored yet.
892 config.llvm_skip_rebuild = llvm_skip_rebuild.unwrap_or(false);
895 config.llvm_assertions = llvm_assertions.unwrap_or(default);
898 config.rust_optimize = optimize.unwrap_or(default);
900 let default = debug == Some(true);
901 config.rust_debug_assertions = debug_assertions.unwrap_or(default);
902 config.rust_debug_assertions_std =
903 debug_assertions_std.unwrap_or(config.rust_debug_assertions);
905 config.rust_debug_logging = debug_logging.unwrap_or(config.rust_debug_assertions);
907 let with_defaults = |debuginfo_level_specific: Option<u32>| {
908 debuginfo_level_specific.or(debuginfo_level).unwrap_or(if debug == Some(true) {
914 config.rust_debuginfo_level_rustc = with_defaults(debuginfo_level_rustc);
915 config.rust_debuginfo_level_std = with_defaults(debuginfo_level_std);
916 config.rust_debuginfo_level_tools = with_defaults(debuginfo_level_tools);
917 config.rust_debuginfo_level_tests = debuginfo_level_tests.unwrap_or(0);
919 let default = config.channel == "dev";
920 config.ignore_git = ignore_git.unwrap_or(default);
925 /// Try to find the relative path of `bindir`, otherwise return it in full.
926 pub fn bindir_relative(&self) -> &Path {
927 let bindir = &self.bindir;
928 if bindir.is_absolute() {
929 // Try to make it relative to the prefix.
930 if let Some(prefix) = &self.prefix {
931 if let Ok(stripped) = bindir.strip_prefix(prefix) {
939 /// Try to find the relative path of `libdir`.
940 pub fn libdir_relative(&self) -> Option<&Path> {
941 let libdir = self.libdir.as_ref()?;
942 if libdir.is_relative() {
945 // Try to make it relative to the prefix.
946 libdir.strip_prefix(self.prefix.as_ref()?).ok()
950 pub fn verbose(&self) -> bool {
954 pub fn very_verbose(&self) -> bool {
958 pub fn llvm_enabled(&self) -> bool {
959 self.rust_codegen_backends.contains(&INTERNER.intern_str("llvm"))
963 fn set<T>(field: &mut T, val: Option<T>) {
964 if let Some(v) = val {
969 fn threads_from_config(v: u32) -> u32 {
971 0 => num_cpus::get() as u32,