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