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