src/bootstrap/config.rs

   1 //! Serialized configuration of a build.
   2 //!
   3 //! This module implements parsing `config.toml` configuration files to tweak
   4 //! how the build runs.
   5
   6 use std::cmp;
   7 use std::collections::{HashMap, HashSet};
   8 use std::env;
   9 use std::ffi::OsString;
  10 use std::fmt;
  11 use std::fs;
  12 use std::path::{Path, PathBuf};
  13
  14 use crate::cache::{Interned, INTERNER};
  15 use crate::flags::Flags;
  16 pub use crate::flags::Subcommand;
  17 use crate::util::exe;
  18 use build_helper::t;
  19 use serde::Deserialize;
  20
  21 macro_rules! check_ci_llvm {
  22     ($name:expr) => {
  23         assert!(
  24             $name.is_none(),
  25             "setting {} is incompatible with download-ci-llvm.",
  26             stringify!($name)
  27         );
  28     };
  29 }
  30
  31 /// Global configuration for the entire build and/or bootstrap.
  32 ///
  33 /// This structure is derived from a combination of both `config.toml` and
  34 /// `config.mk`. As of the time of this writing it's unlikely that `config.toml`
  35 /// is used all that much, so this is primarily filled out by `config.mk` which
  36 /// is generated from `./configure`.
  37 ///
  38 /// Note that this structure is not decoded directly into, but rather it is
  39 /// filled out from the decoded forms of the structs below. For documentation
  40 /// each field, see the corresponding fields in
  41 /// `config.toml.example`.
  42 #[derive(Default)]
  43 pub struct Config {
  44     pub ccache: Option<String>,
  45     /// Call Build::ninja() instead of this.
  46     pub ninja_in_file: bool,
  47     pub verbose: usize,
  48     pub submodules: bool,
  49     pub fast_submodules: bool,
  50     pub compiler_docs: bool,
  51     pub docs: bool,
  52     pub locked_deps: bool,
  53     pub vendor: bool,
  54     pub target_config: HashMap<TargetSelection, Target>,
  55     pub full_bootstrap: bool,
  56     pub extended: bool,
  57     pub tools: Option<HashSet<String>>,
  58     pub sanitizers: bool,
  59     pub profiler: bool,
  60     pub ignore_git: bool,
  61     pub exclude: Vec<PathBuf>,
  62     pub rustc_error_format: Option<String>,
  63     pub json_output: bool,
  64     pub test_compare_mode: bool,
  65     pub llvm_libunwind: bool,
  66
  67     pub skip_only_host_steps: bool,
  68
  69     pub on_fail: Option<String>,
  70     pub stage: u32,
  71     pub keep_stage: Vec<u32>,
  72     pub src: PathBuf,
  73     pub jobs: Option<u32>,
  74     pub cmd: Subcommand,
  75     pub incremental: bool,
  76     pub dry_run: bool,
  77
  78     pub deny_warnings: bool,
  79     pub backtrace_on_ice: bool,
  80
  81     // llvm codegen options
  82     pub llvm_skip_rebuild: bool,
  83     pub llvm_assertions: bool,
  84     pub llvm_optimize: bool,
  85     pub llvm_thin_lto: bool,
  86     pub llvm_release_debuginfo: bool,
  87     pub llvm_version_check: bool,
  88     pub llvm_static_stdcpp: bool,
  89     pub llvm_link_shared: bool,
  90     pub llvm_clang_cl: Option<String>,
  91     pub llvm_targets: Option<String>,
  92     pub llvm_experimental_targets: Option<String>,
  93     pub llvm_link_jobs: Option<u32>,
  94     pub llvm_version_suffix: Option<String>,
  95     pub llvm_use_linker: Option<String>,
  96     pub llvm_allow_old_toolchain: Option<bool>,
  97     pub llvm_from_ci: bool,
  98
  99     pub use_lld: bool,
 100     pub lld_enabled: bool,
 101     pub llvm_tools_enabled: bool,
 102
 103     pub llvm_cflags: Option<String>,
 104     pub llvm_cxxflags: Option<String>,
 105     pub llvm_ldflags: Option<String>,
 106     pub llvm_use_libcxx: bool,
 107
 108     // rust codegen options
 109     pub rust_optimize: bool,
 110     pub rust_codegen_units: Option<u32>,
 111     pub rust_codegen_units_std: Option<u32>,
 112     pub rust_debug_assertions: bool,
 113     pub rust_debug_assertions_std: bool,
 114     pub rust_debug_logging: bool,
 115     pub rust_debuginfo_level_rustc: u32,
 116     pub rust_debuginfo_level_std: u32,
 117     pub rust_debuginfo_level_tools: u32,
 118     pub rust_debuginfo_level_tests: u32,
 119     pub rust_rpath: bool,
 120     pub rustc_parallel: bool,
 121     pub rustc_default_linker: Option<String>,
 122     pub rust_optimize_tests: bool,
 123     pub rust_dist_src: bool,
 124     pub rust_codegen_backends: Vec<Interned<String>>,
 125     pub rust_verify_llvm_ir: bool,
 126     pub rust_thin_lto_import_instr_limit: Option<u32>,
 127     pub rust_remap_debuginfo: bool,
 128     pub rust_new_symbol_mangling: bool,
 129
 130     pub build: TargetSelection,
 131     pub hosts: Vec<TargetSelection>,
 132     pub targets: Vec<TargetSelection>,
 133     pub local_rebuild: bool,
 134     pub jemalloc: bool,
 135     pub control_flow_guard: bool,
 136
 137     // dist misc
 138     pub dist_sign_folder: Option<PathBuf>,
 139     pub dist_upload_addr: Option<String>,
 140     pub dist_gpg_password_file: Option<PathBuf>,
 141
 142     // libstd features
 143     pub backtrace: bool, // support for RUST_BACKTRACE
 144
 145     // misc
 146     pub low_priority: bool,
 147     pub channel: String,
 148     pub verbose_tests: bool,
 149     pub save_toolstates: Option<PathBuf>,
 150     pub print_step_timings: bool,
 151     pub missing_tools: bool,
 152
 153     // Fallback musl-root for all targets
 154     pub musl_root: Option<PathBuf>,
 155     pub prefix: Option<PathBuf>,
 156     pub sysconfdir: Option<PathBuf>,
 157     pub datadir: Option<PathBuf>,
 158     pub docdir: Option<PathBuf>,
 159     pub bindir: PathBuf,
 160     pub libdir: Option<PathBuf>,
 161     pub mandir: Option<PathBuf>,
 162     pub codegen_tests: bool,
 163     pub nodejs: Option<PathBuf>,
 164     pub gdb: Option<PathBuf>,
 165     pub python: Option<PathBuf>,
 166     pub cargo_native_static: bool,
 167     pub configure_args: Vec<String>,
 168
 169     // These are either the stage0 downloaded binaries or the locally installed ones.
 170     pub initial_cargo: PathBuf,
 171     pub initial_rustc: PathBuf,
 172     pub initial_rustfmt: Option<PathBuf>,
 173     pub out: PathBuf,
 174 }
 175
 176 #[derive(Debug, Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
 177 pub struct TargetSelection {
 178     pub triple: Interned<String>,
 179     file: Option<Interned<String>>,
 180 }
 181
 182 impl TargetSelection {
 183     pub fn from_user(selection: &str) -> Self {
 184         let path = Path::new(selection);
 185
 186         let (triple, file) = if path.exists() {
 187             let triple = path
 188                 .file_stem()
 189                 .expect("Target specification file has no file stem")
 190                 .to_str()
 191                 .expect("Target specification file stem is not UTF-8");
 192
 193             (triple, Some(selection))
 194         } else {
 195             (selection, None)
 196         };
 197
 198         let triple = INTERNER.intern_str(triple);
 199         let file = file.map(|f| INTERNER.intern_str(f));
 200
 201         Self { triple, file }
 202     }
 203
 204     pub fn rustc_target_arg(&self) -> &str {
 205         self.file.as_ref().unwrap_or(&self.triple)
 206     }
 207
 208     pub fn contains(&self, needle: &str) -> bool {
 209         self.triple.contains(needle)
 210     }
 211
 212     pub fn starts_with(&self, needle: &str) -> bool {
 213         self.triple.starts_with(needle)
 214     }
 215
 216     pub fn ends_with(&self, needle: &str) -> bool {
 217         self.triple.ends_with(needle)
 218     }
 219 }
 220
 221 impl fmt::Display for TargetSelection {
 222     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 223         write!(f, "{}", self.triple)?;
 224         if let Some(file) = self.file {
 225             write!(f, "({})", file)?;
 226         }
 227         Ok(())
 228     }
 229 }
 230
 231 impl PartialEq<&str> for TargetSelection {
 232     fn eq(&self, other: &&str) -> bool {
 233         self.triple == *other
 234     }
 235 }
 236
 237 /// Per-target configuration stored in the global configuration structure.
 238 #[derive(Default)]
 239 pub struct Target {
 240     /// Some(path to llvm-config) if using an external LLVM.
 241     pub llvm_config: Option<PathBuf>,
 242     /// Some(path to FileCheck) if one was specified.
 243     pub llvm_filecheck: Option<PathBuf>,
 244     pub cc: Option<PathBuf>,
 245     pub cxx: Option<PathBuf>,
 246     pub ar: Option<PathBuf>,
 247     pub ranlib: Option<PathBuf>,
 248     pub linker: Option<PathBuf>,
 249     pub ndk: Option<PathBuf>,
 250     pub crt_static: Option<bool>,
 251     pub musl_root: Option<PathBuf>,
 252     pub musl_libdir: Option<PathBuf>,
 253     pub wasi_root: Option<PathBuf>,
 254     pub qemu_rootfs: Option<PathBuf>,
 255     pub no_std: bool,
 256 }
 257
 258 impl Target {
 259     pub fn from_triple(triple: &str) -> Self {
 260         let mut target: Self = Default::default();
 261         if triple.contains("-none") || triple.contains("nvptx") {
 262             target.no_std = true;
 263         }
 264         target
 265     }
 266 }
 267 /// Structure of the `config.toml` file that configuration is read from.
 268 ///
 269 /// This structure uses `Decodable` to automatically decode a TOML configuration
 270 /// file into this format, and then this is traversed and written into the above
 271 /// `Config` structure.
 272 #[derive(Deserialize, Default)]
 273 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 274 struct TomlConfig {
 275     build: Option<Build>,
 276     install: Option<Install>,
 277     llvm: Option<Llvm>,
 278     rust: Option<Rust>,
 279     target: Option<HashMap<String, TomlTarget>>,
 280     dist: Option<Dist>,
 281 }
 282
 283 /// TOML representation of various global build decisions.
 284 #[derive(Deserialize, Default, Clone)]
 285 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 286 struct Build {
 287     build: Option<String>,
 288     host: Option<Vec<String>>,
 289     target: Option<Vec<String>>,
 290     // This is ignored, the rust code always gets the build directory from the `BUILD_DIR` env variable
 291     build_dir: Option<String>,
 292     cargo: Option<String>,
 293     rustc: Option<String>,
 294     rustfmt: Option<String>, /* allow bootstrap.py to use rustfmt key */
 295     docs: Option<bool>,
 296     compiler_docs: Option<bool>,
 297     submodules: Option<bool>,
 298     fast_submodules: Option<bool>,
 299     gdb: Option<String>,
 300     nodejs: Option<String>,
 301     python: Option<String>,
 302     locked_deps: Option<bool>,
 303     vendor: Option<bool>,
 304     full_bootstrap: Option<bool>,
 305     extended: Option<bool>,
 306     tools: Option<HashSet<String>>,
 307     verbose: Option<usize>,
 308     sanitizers: Option<bool>,
 309     profiler: Option<bool>,
 310     cargo_native_static: Option<bool>,
 311     low_priority: Option<bool>,
 312     configure_args: Option<Vec<String>>,
 313     local_rebuild: Option<bool>,
 314     print_step_timings: Option<bool>,
 315     doc_stage: Option<u32>,
 316     build_stage: Option<u32>,
 317     test_stage: Option<u32>,
 318     install_stage: Option<u32>,
 319     dist_stage: Option<u32>,
 320     bench_stage: Option<u32>,
 321 }
 322
 323 /// TOML representation of various global install decisions.
 324 #[derive(Deserialize, Default, Clone)]
 325 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 326 struct Install {
 327     prefix: Option<String>,
 328     sysconfdir: Option<String>,
 329     docdir: Option<String>,
 330     bindir: Option<String>,
 331     libdir: Option<String>,
 332     mandir: Option<String>,
 333     datadir: Option<String>,
 334
 335     // standard paths, currently unused
 336     infodir: Option<String>,
 337     localstatedir: Option<String>,
 338 }
 339
 340 /// TOML representation of how the LLVM build is configured.
 341 #[derive(Deserialize, Default)]
 342 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 343 struct Llvm {
 344     skip_rebuild: Option<bool>,
 345     optimize: Option<bool>,
 346     thin_lto: Option<bool>,
 347     release_debuginfo: Option<bool>,
 348     assertions: Option<bool>,
 349     ccache: Option<StringOrBool>,
 350     version_check: Option<bool>,
 351     static_libstdcpp: Option<bool>,
 352     ninja: Option<bool>,
 353     targets: Option<String>,
 354     experimental_targets: Option<String>,
 355     link_jobs: Option<u32>,
 356     link_shared: Option<bool>,
 357     version_suffix: Option<String>,
 358     clang_cl: Option<String>,
 359     cflags: Option<String>,
 360     cxxflags: Option<String>,
 361     ldflags: Option<String>,
 362     use_libcxx: Option<bool>,
 363     use_linker: Option<String>,
 364     allow_old_toolchain: Option<bool>,
 365     download_ci_llvm: Option<bool>,
 366 }
 367
 368 #[derive(Deserialize, Default, Clone)]
 369 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 370 struct Dist {
 371     sign_folder: Option<String>,
 372     gpg_password_file: Option<String>,
 373     upload_addr: Option<String>,
 374     src_tarball: Option<bool>,
 375     missing_tools: Option<bool>,
 376 }
 377
 378 #[derive(Deserialize)]
 379 #[serde(untagged)]
 380 enum StringOrBool {
 381     String(String),
 382     Bool(bool),
 383 }
 384
 385 impl Default for StringOrBool {
 386     fn default() -> StringOrBool {
 387         StringOrBool::Bool(false)
 388     }
 389 }
 390
 391 /// TOML representation of how the Rust build is configured.
 392 #[derive(Deserialize, Default)]
 393 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 394 struct Rust {
 395     optimize: Option<bool>,
 396     debug: Option<bool>,
 397     codegen_units: Option<u32>,
 398     codegen_units_std: Option<u32>,
 399     debug_assertions: Option<bool>,
 400     debug_assertions_std: Option<bool>,
 401     debug_logging: Option<bool>,
 402     debuginfo_level: Option<u32>,
 403     debuginfo_level_rustc: Option<u32>,
 404     debuginfo_level_std: Option<u32>,
 405     debuginfo_level_tools: Option<u32>,
 406     debuginfo_level_tests: Option<u32>,
 407     backtrace: Option<bool>,
 408     incremental: Option<bool>,
 409     parallel_compiler: Option<bool>,
 410     default_linker: Option<String>,
 411     channel: Option<String>,
 412     musl_root: Option<String>,
 413     rpath: Option<bool>,
 414     verbose_tests: Option<bool>,
 415     optimize_tests: Option<bool>,
 416     codegen_tests: Option<bool>,
 417     ignore_git: Option<bool>,
 418     dist_src: Option<bool>,
 419     save_toolstates: Option<String>,
 420     codegen_backends: Option<Vec<String>>,
 421     lld: Option<bool>,
 422     use_lld: Option<bool>,
 423     llvm_tools: Option<bool>,
 424     deny_warnings: Option<bool>,
 425     backtrace_on_ice: Option<bool>,
 426     verify_llvm_ir: Option<bool>,
 427     thin_lto_import_instr_limit: Option<u32>,
 428     remap_debuginfo: Option<bool>,
 429     jemalloc: Option<bool>,
 430     test_compare_mode: Option<bool>,
 431     llvm_libunwind: Option<bool>,
 432     control_flow_guard: Option<bool>,
 433     new_symbol_mangling: Option<bool>,
 434 }
 435
 436 /// TOML representation of how each build target is configured.
 437 #[derive(Deserialize, Default)]
 438 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 439 struct TomlTarget {
 440     cc: Option<String>,
 441     cxx: Option<String>,
 442     ar: Option<String>,
 443     ranlib: Option<String>,
 444     linker: Option<String>,
 445     llvm_config: Option<String>,
 446     llvm_filecheck: Option<String>,
 447     android_ndk: Option<String>,
 448     crt_static: Option<bool>,
 449     musl_root: Option<String>,
 450     musl_libdir: Option<String>,
 451     wasi_root: Option<String>,
 452     qemu_rootfs: Option<String>,
 453     no_std: Option<bool>,
 454 }
 455
 456 impl Config {
 457     fn path_from_python(var_key: &str) -> PathBuf {
 458         match env::var_os(var_key) {
 459             Some(var_val) => Self::normalize_python_path(var_val),
 460             _ => panic!("expected '{}' to be set", var_key),
 461         }
 462     }
 463
 464     /// Normalizes paths from Python slightly. We don't trust paths from Python (#49785).
 465     fn normalize_python_path(path: OsString) -> PathBuf {
 466         Path::new(&path).components().collect()
 467     }
 468
 469     pub fn default_opts() -> Config {
 470         let mut config = Config::default();
 471         config.llvm_optimize = true;
 472         config.ninja_in_file = true;
 473         config.llvm_version_check = true;
 474         config.backtrace = true;
 475         config.rust_optimize = true;
 476         config.rust_optimize_tests = true;
 477         config.submodules = true;
 478         config.fast_submodules = true;
 479         config.docs = true;
 480         config.rust_rpath = true;
 481         config.channel = "dev".to_string();
 482         config.codegen_tests = true;
 483         config.ignore_git = false;
 484         config.rust_dist_src = true;
 485         config.rust_codegen_backends = vec![INTERNER.intern_str("llvm")];
 486         config.deny_warnings = true;
 487         config.missing_tools = false;
 488
 489         // set by bootstrap.py
 490         config.build = TargetSelection::from_user(&env::var("BUILD").expect("'BUILD' to be set"));
 491         config.src = Config::path_from_python("SRC");
 492         config.out = Config::path_from_python("BUILD_DIR");
 493
 494         config.initial_rustc = Config::path_from_python("RUSTC");
 495         config.initial_cargo = Config::path_from_python("CARGO");
 496         config.initial_rustfmt = env::var_os("RUSTFMT").map(Config::normalize_python_path);
 497
 498         config
 499     }
 500
 501     pub fn parse(args: &[String]) -> Config {
 502         let flags = Flags::parse(&args);
 503
 504         let mut config = Config::default_opts();
 505         config.exclude = flags.exclude;
 506         config.rustc_error_format = flags.rustc_error_format;
 507         config.json_output = flags.json_output;
 508         config.on_fail = flags.on_fail;
 509         config.jobs = flags.jobs.map(threads_from_config);
 510         config.cmd = flags.cmd;
 511         config.incremental = flags.incremental;
 512         config.dry_run = flags.dry_run;
 513         config.keep_stage = flags.keep_stage;
 514         config.bindir = "bin".into(); // default
 515         if let Some(value) = flags.deny_warnings {
 516             config.deny_warnings = value;
 517         }
 518
 519         if config.dry_run {
 520             let dir = config.out.join("tmp-dry-run");
 521             t!(fs::create_dir_all(&dir));
 522             config.out = dir;
 523         }
 524
 525         #[cfg(test)]
 526         let toml = TomlConfig::default();
 527         #[cfg(not(test))]
 528         let toml = flags
 529             .config
 530             .map(|file| {
 531                 use std::process;
 532
 533                 let contents = t!(fs::read_to_string(&file));
 534                 match toml::from_str(&contents) {
 535                     Ok(table) => table,
 536                     Err(err) => {
 537                         println!(
 538                             "failed to parse TOML configuration '{}': {}",
 539                             file.display(),
 540                             err
 541                         );
 542                         process::exit(2);
 543                     }
 544                 }
 545             })
 546             .unwrap_or_else(TomlConfig::default);
 547
 548         let build = toml.build.unwrap_or_default();
 549
 550         // If --target was specified but --host wasn't specified, don't run any host-only tests.
 551         let has_hosts = build.host.is_some() || flags.host.is_some();
 552         let has_targets = build.target.is_some() || flags.target.is_some();
 553         config.skip_only_host_steps = !has_hosts && has_targets;
 554
 555         config.hosts = if let Some(arg_host) = flags.host {
 556             arg_host
 557         } else if let Some(file_host) = build.host {
 558             file_host.iter().map(|h| TargetSelection::from_user(h)).collect()
 559         } else {
 560             vec![config.build]
 561         };
 562         config.targets = if let Some(arg_target) = flags.target {
 563             arg_target
 564         } else if let Some(file_target) = build.target {
 565             file_target.iter().map(|h| TargetSelection::from_user(h)).collect()
 566         } else {
 567             // If target is *not* configured, then default to the host
 568             // toolchains.
 569             config.hosts.clone()
 570         };
 571
 572         config.nodejs = build.nodejs.map(PathBuf::from);
 573         config.gdb = build.gdb.map(PathBuf::from);
 574         config.python = build.python.map(PathBuf::from);
 575         set(&mut config.low_priority, build.low_priority);
 576         set(&mut config.compiler_docs, build.compiler_docs);
 577         set(&mut config.docs, build.docs);
 578         set(&mut config.submodules, build.submodules);
 579         set(&mut config.fast_submodules, build.fast_submodules);
 580         set(&mut config.locked_deps, build.locked_deps);
 581         set(&mut config.vendor, build.vendor);
 582         set(&mut config.full_bootstrap, build.full_bootstrap);
 583         set(&mut config.extended, build.extended);
 584         config.tools = build.tools;
 585         set(&mut config.verbose, build.verbose);
 586         set(&mut config.sanitizers, build.sanitizers);
 587         set(&mut config.profiler, build.profiler);
 588         set(&mut config.cargo_native_static, build.cargo_native_static);
 589         set(&mut config.configure_args, build.configure_args);
 590         set(&mut config.local_rebuild, build.local_rebuild);
 591         set(&mut config.print_step_timings, build.print_step_timings);
 592
 593         // See https://github.com/rust-lang/compiler-team/issues/326
 594         config.stage = match config.cmd {
 595             Subcommand::Doc { .. } => flags.stage.or(build.doc_stage).unwrap_or(0),
 596             Subcommand::Build { .. } => flags.stage.or(build.build_stage).unwrap_or(1),
 597             Subcommand::Test { .. } => flags.stage.or(build.test_stage).unwrap_or(1),
 598             Subcommand::Bench { .. } => flags.stage.or(build.bench_stage).unwrap_or(2),
 599             Subcommand::Dist { .. } => flags.stage.or(build.dist_stage).unwrap_or(2),
 600             Subcommand::Install { .. } => flags.stage.or(build.install_stage).unwrap_or(2),
 601             // These are all bootstrap tools, which don't depend on the compiler.
 602             // The stage we pass shouldn't matter, but use 0 just in case.
 603             Subcommand::Clean { .. }
 604             | Subcommand::Check { .. }
 605             | Subcommand::Clippy { .. }
 606             | Subcommand::Fix { .. }
 607             | Subcommand::Run { .. }
 608             | Subcommand::Format { .. } => flags.stage.unwrap_or(0),
 609         };
 610
 611         // CI should always run stage 2 builds, unless it specifically states otherwise
 612         #[cfg(not(test))]
 613         if flags.stage.is_none() && crate::CiEnv::current() != crate::CiEnv::None {
 614             match config.cmd {
 615                 Subcommand::Test { .. }
 616                 | Subcommand::Doc { .. }
 617                 | Subcommand::Build { .. }
 618                 | Subcommand::Bench { .. }
 619                 | Subcommand::Dist { .. }
 620                 | Subcommand::Install { .. } => assert_eq!(config.stage, 2),
 621                 Subcommand::Clean { .. }
 622                 | Subcommand::Check { .. }
 623                 | Subcommand::Clippy { .. }
 624                 | Subcommand::Fix { .. }
 625                 | Subcommand::Run { .. }
 626                 | Subcommand::Format { .. } => {}
 627             }
 628         }
 629
 630         config.verbose = cmp::max(config.verbose, flags.verbose);
 631
 632         if let Some(install) = toml.install {
 633             config.prefix = install.prefix.map(PathBuf::from);
 634             config.sysconfdir = install.sysconfdir.map(PathBuf::from);
 635             config.datadir = install.datadir.map(PathBuf::from);
 636             config.docdir = install.docdir.map(PathBuf::from);
 637             set(&mut config.bindir, install.bindir.map(PathBuf::from));
 638             config.libdir = install.libdir.map(PathBuf::from);
 639             config.mandir = install.mandir.map(PathBuf::from);
 640         }
 641
 642         // We want the llvm-skip-rebuild flag to take precedence over the
 643         // skip-rebuild config.toml option so we store it separately
 644         // so that we can infer the right value
 645         let mut llvm_skip_rebuild = flags.llvm_skip_rebuild;
 646
 647         // Store off these values as options because if they're not provided
 648         // we'll infer default values for them later
 649         let mut llvm_assertions = None;
 650         let mut debug = None;
 651         let mut debug_assertions = None;
 652         let mut debug_assertions_std = None;
 653         let mut debug_logging = None;
 654         let mut debuginfo_level = None;
 655         let mut debuginfo_level_rustc = None;
 656         let mut debuginfo_level_std = None;
 657         let mut debuginfo_level_tools = None;
 658         let mut debuginfo_level_tests = None;
 659         let mut optimize = None;
 660         let mut ignore_git = None;
 661
 662         if let Some(llvm) = toml.llvm {
 663             match llvm.ccache {
 664                 Some(StringOrBool::String(ref s)) => config.ccache = Some(s.to_string()),
 665                 Some(StringOrBool::Bool(true)) => {
 666                     config.ccache = Some("ccache".to_string());
 667                 }
 668                 Some(StringOrBool::Bool(false)) | None => {}
 669             }
 670             set(&mut config.ninja_in_file, llvm.ninja);
 671             llvm_assertions = llvm.assertions;
 672             llvm_skip_rebuild = llvm_skip_rebuild.or(llvm.skip_rebuild);
 673             set(&mut config.llvm_optimize, llvm.optimize);
 674             set(&mut config.llvm_thin_lto, llvm.thin_lto);
 675             set(&mut config.llvm_release_debuginfo, llvm.release_debuginfo);
 676             set(&mut config.llvm_version_check, llvm.version_check);
 677             set(&mut config.llvm_static_stdcpp, llvm.static_libstdcpp);
 678             set(&mut config.llvm_link_shared, llvm.link_shared);
 679             config.llvm_targets = llvm.targets.clone();
 680             config.llvm_experimental_targets = llvm.experimental_targets.clone();
 681             config.llvm_link_jobs = llvm.link_jobs;
 682             config.llvm_version_suffix = llvm.version_suffix.clone();
 683             config.llvm_clang_cl = llvm.clang_cl.clone();
 684
 685             config.llvm_cflags = llvm.cflags.clone();
 686             config.llvm_cxxflags = llvm.cxxflags.clone();
 687             config.llvm_ldflags = llvm.ldflags.clone();
 688             set(&mut config.llvm_use_libcxx, llvm.use_libcxx);
 689             config.llvm_use_linker = llvm.use_linker.clone();
 690             config.llvm_allow_old_toolchain = llvm.allow_old_toolchain;
 691             config.llvm_from_ci = llvm.download_ci_llvm.unwrap_or(false);
 692
 693             if config.llvm_from_ci {
 694                 // None of the LLVM options, except assertions, are supported
 695                 // when using downloaded LLVM. We could just ignore these but
 696                 // that's potentially confusing, so force them to not be
 697                 // explicitly set. The defaults and CI defaults don't
 698                 // necessarily match but forcing people to match (somewhat
 699                 // arbitrary) CI configuration locally seems bad/hard.
 700                 check_ci_llvm!(llvm.optimize);
 701                 check_ci_llvm!(llvm.thin_lto);
 702                 check_ci_llvm!(llvm.release_debuginfo);
 703                 check_ci_llvm!(llvm.link_shared);
 704                 check_ci_llvm!(llvm.static_libstdcpp);
 705                 check_ci_llvm!(llvm.targets);
 706                 check_ci_llvm!(llvm.experimental_targets);
 707                 check_ci_llvm!(llvm.link_jobs);
 708                 check_ci_llvm!(llvm.link_shared);
 709                 check_ci_llvm!(llvm.clang_cl);
 710                 check_ci_llvm!(llvm.version_suffix);
 711                 check_ci_llvm!(llvm.cflags);
 712                 check_ci_llvm!(llvm.cxxflags);
 713                 check_ci_llvm!(llvm.ldflags);
 714                 check_ci_llvm!(llvm.use_libcxx);
 715                 check_ci_llvm!(llvm.use_linker);
 716                 check_ci_llvm!(llvm.allow_old_toolchain);
 717
 718                 // CI-built LLVM is shared
 719                 config.llvm_link_shared = true;
 720             }
 721
 722             if config.llvm_thin_lto {
 723                 // If we're building with ThinLTO on, we want to link to LLVM
 724                 // shared, to avoid re-doing ThinLTO (which happens in the link
 725                 // step) with each stage.
 726                 config.llvm_link_shared = true;
 727             }
 728         }
 729
 730         if let Some(rust) = toml.rust {
 731             debug = rust.debug;
 732             debug_assertions = rust.debug_assertions;
 733             debug_assertions_std = rust.debug_assertions_std;
 734             debug_logging = rust.debug_logging;
 735             debuginfo_level = rust.debuginfo_level;
 736             debuginfo_level_rustc = rust.debuginfo_level_rustc;
 737             debuginfo_level_std = rust.debuginfo_level_std;
 738             debuginfo_level_tools = rust.debuginfo_level_tools;
 739             debuginfo_level_tests = rust.debuginfo_level_tests;
 740             optimize = rust.optimize;
 741             ignore_git = rust.ignore_git;
 742             set(&mut config.rust_new_symbol_mangling, rust.new_symbol_mangling);
 743             set(&mut config.rust_optimize_tests, rust.optimize_tests);
 744             set(&mut config.codegen_tests, rust.codegen_tests);
 745             set(&mut config.rust_rpath, rust.rpath);
 746             set(&mut config.jemalloc, rust.jemalloc);
 747             set(&mut config.test_compare_mode, rust.test_compare_mode);
 748             set(&mut config.llvm_libunwind, rust.llvm_libunwind);
 749             set(&mut config.backtrace, rust.backtrace);
 750             set(&mut config.channel, rust.channel);
 751             set(&mut config.rust_dist_src, rust.dist_src);
 752             set(&mut config.verbose_tests, rust.verbose_tests);
 753             // in the case "false" is set explicitly, do not overwrite the command line args
 754             if let Some(true) = rust.incremental {
 755                 config.incremental = true;
 756             }
 757             set(&mut config.use_lld, rust.use_lld);
 758             set(&mut config.lld_enabled, rust.lld);
 759             set(&mut config.llvm_tools_enabled, rust.llvm_tools);
 760             config.rustc_parallel = rust.parallel_compiler.unwrap_or(false);
 761             config.rustc_default_linker = rust.default_linker;
 762             config.musl_root = rust.musl_root.map(PathBuf::from);
 763             config.save_toolstates = rust.save_toolstates.map(PathBuf::from);
 764             set(&mut config.deny_warnings, flags.deny_warnings.or(rust.deny_warnings));
 765             set(&mut config.backtrace_on_ice, rust.backtrace_on_ice);
 766             set(&mut config.rust_verify_llvm_ir, rust.verify_llvm_ir);
 767             config.rust_thin_lto_import_instr_limit = rust.thin_lto_import_instr_limit;
 768             set(&mut config.rust_remap_debuginfo, rust.remap_debuginfo);
 769             set(&mut config.control_flow_guard, rust.control_flow_guard);
 770
 771             if let Some(ref backends) = rust.codegen_backends {
 772                 config.rust_codegen_backends =
 773                     backends.iter().map(|s| INTERNER.intern_str(s)).collect();
 774             }
 775
 776             config.rust_codegen_units = rust.codegen_units.map(threads_from_config);
 777             config.rust_codegen_units_std = rust.codegen_units_std.map(threads_from_config);
 778         }
 779
 780         if let Some(t) = toml.target {
 781             for (triple, cfg) in t {
 782                 let mut target = Target::from_triple(&triple);
 783
 784                 if let Some(ref s) = cfg.llvm_config {
 785                     target.llvm_config = Some(config.src.join(s));
 786                 }
 787                 if let Some(ref s) = cfg.llvm_filecheck {
 788                     target.llvm_filecheck = Some(config.src.join(s));
 789                 }
 790                 if let Some(ref s) = cfg.android_ndk {
 791                     target.ndk = Some(config.src.join(s));
 792                 }
 793                 if let Some(s) = cfg.no_std {
 794                     target.no_std = s;
 795                 }
 796                 target.cc = cfg.cc.map(PathBuf::from);
 797                 target.cxx = cfg.cxx.map(PathBuf::from);
 798                 target.ar = cfg.ar.map(PathBuf::from);
 799                 target.ranlib = cfg.ranlib.map(PathBuf::from);
 800                 target.linker = cfg.linker.map(PathBuf::from);
 801                 target.crt_static = cfg.crt_static;
 802                 target.musl_root = cfg.musl_root.map(PathBuf::from);
 803                 target.musl_libdir = cfg.musl_libdir.map(PathBuf::from);
 804                 target.wasi_root = cfg.wasi_root.map(PathBuf::from);
 805                 target.qemu_rootfs = cfg.qemu_rootfs.map(PathBuf::from);
 806
 807                 config.target_config.insert(TargetSelection::from_user(&triple), target);
 808             }
 809         }
 810
 811         if config.llvm_from_ci {
 812             let triple = &config.build.triple;
 813             let mut build_target = config
 814                 .target_config
 815                 .entry(config.build)
 816                 .or_insert_with(|| Target::from_triple(&triple));
 817
 818             check_ci_llvm!(build_target.llvm_config);
 819             check_ci_llvm!(build_target.llvm_filecheck);
 820             let ci_llvm_bin = config.out.join(&*config.build.triple).join("ci-llvm/bin");
 821             build_target.llvm_config = Some(ci_llvm_bin.join(exe("llvm-config", config.build)));
 822             build_target.llvm_filecheck = Some(ci_llvm_bin.join(exe("FileCheck", config.build)));
 823         }
 824
 825         if let Some(t) = toml.dist {
 826             config.dist_sign_folder = t.sign_folder.map(PathBuf::from);
 827             config.dist_gpg_password_file = t.gpg_password_file.map(PathBuf::from);
 828             config.dist_upload_addr = t.upload_addr;
 829             set(&mut config.rust_dist_src, t.src_tarball);
 830             set(&mut config.missing_tools, t.missing_tools);
 831         }
 832
 833         // Now that we've reached the end of our configuration, infer the
 834         // default values for all options that we haven't otherwise stored yet.
 835
 836         set(&mut config.initial_rustc, build.rustc.map(PathBuf::from));
 837         set(&mut config.initial_cargo, build.cargo.map(PathBuf::from));
 838
 839         config.llvm_skip_rebuild = llvm_skip_rebuild.unwrap_or(false);
 840
 841         let default = false;
 842         config.llvm_assertions = llvm_assertions.unwrap_or(default);
 843
 844         let default = true;
 845         config.rust_optimize = optimize.unwrap_or(default);
 846
 847         let default = debug == Some(true);
 848         config.rust_debug_assertions = debug_assertions.unwrap_or(default);
 849         config.rust_debug_assertions_std =
 850             debug_assertions_std.unwrap_or(config.rust_debug_assertions);
 851
 852         config.rust_debug_logging = debug_logging.unwrap_or(config.rust_debug_assertions);
 853
 854         let with_defaults = |debuginfo_level_specific: Option<u32>| {
 855             debuginfo_level_specific.or(debuginfo_level).unwrap_or(if debug == Some(true) {
 856                 1
 857             } else {
 858                 0
 859             })
 860         };
 861         config.rust_debuginfo_level_rustc = with_defaults(debuginfo_level_rustc);
 862         config.rust_debuginfo_level_std = with_defaults(debuginfo_level_std);
 863         config.rust_debuginfo_level_tools = with_defaults(debuginfo_level_tools);
 864         config.rust_debuginfo_level_tests = debuginfo_level_tests.unwrap_or(0);
 865
 866         let default = config.channel == "dev";
 867         config.ignore_git = ignore_git.unwrap_or(default);
 868
 869         config
 870     }
 871
 872     /// Try to find the relative path of `bindir`, otherwise return it in full.
 873     pub fn bindir_relative(&self) -> &Path {
 874         let bindir = &self.bindir;
 875         if bindir.is_absolute() {
 876             // Try to make it relative to the prefix.
 877             if let Some(prefix) = &self.prefix {
 878                 if let Ok(stripped) = bindir.strip_prefix(prefix) {
 879                     return stripped;
 880                 }
 881             }
 882         }
 883         bindir
 884     }
 885
 886     /// Try to find the relative path of `libdir`.
 887     pub fn libdir_relative(&self) -> Option<&Path> {
 888         let libdir = self.libdir.as_ref()?;
 889         if libdir.is_relative() {
 890             Some(libdir)
 891         } else {
 892             // Try to make it relative to the prefix.
 893             libdir.strip_prefix(self.prefix.as_ref()?).ok()
 894         }
 895     }
 896
 897     pub fn verbose(&self) -> bool {
 898         self.verbose > 0
 899     }
 900
 901     pub fn very_verbose(&self) -> bool {
 902         self.verbose > 1
 903     }
 904
 905     pub fn llvm_enabled(&self) -> bool {
 906         self.rust_codegen_backends.contains(&INTERNER.intern_str("llvm"))
 907     }
 908 }
 909
 910 fn set<T>(field: &mut T, val: Option<T>) {
 911     if let Some(v) = val {
 912         *field = v;
 913     }
 914 }
 915
 916 fn threads_from_config(v: u32) -> u32 {
 917     match v {
 918         0 => num_cpus::get() as u32,
 919         n => n,
 920     }
 921 }